Add GH Actions JDKx nightly jobs

* Use inline sbt args
* Prefer ubuntu LTS
* Link to tagging issue

.github/workflows/build-test-prValidation.yml

@@ -27,6 +27,7 @@ jobs:
       - name: Cache Coursier cache
         uses: coursier/cache-action@v6.2
 
+## https://github.com/akka/akka/issues/30459
 #    ghtag "$ghprbPullId" akka akka '["validating"]' "tested needs-attention"
 
       - name: Code style check
@@ -44,7 +45,7 @@ jobs:
           scalafmtCheckAll scalafmtSbtCheck test:compile
 
   Check-Publish:
-    name: PR Validation
+    name: Check publishing locally
     runs-on: ubuntu-20.04
     steps:
       - name: Checkout
@@ -114,6 +115,7 @@ jobs:
           -Dakka.log.timestamps=true \
           ${{ matrix.project }}/validatePullRequest
 
+## https://github.com/akka/akka/issues/30459
 ## if success
 #    ghtag "$ghprbPullId" akka akka '["tested"]' "validating needs-attention"
 ## if aborted or unstable

.github/workflows/nightly-jdk11.yml

@@ -0,0 +1,46 @@
+name: Nightly jkd11
+
+on:
+  schedule:
+    - cron:  '0 6 * * *'
+
+jobs:
+  compile-and-test:
+    name: Compile and test
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Set up JDK 11
+        uses: olafurpg/setup-scala@v10
+        with:
+          java-version: adopt@1.11
+
+      - name: Cache Coursier cache
+        uses: coursier/cache-action@v6.2
+
+      - name: Compile and test for JDK11
+        run: |-
+          sbt -jvm-opts .jvmopts-ci \
+            -Dakka.test.timefactor=1 \
+            -Dakka.genjavadoc.enabled=true \
+            -Dakka.test.multi-in-test=false \
+            clean test checkTestsHaveRun
+
+      - name: Email on failure
+        if: ${{ failure() }}
+        uses: dawidd6/action-send-mail@v3
+        with:
+          server_address: smtp.gmail.com
+          server_port: 465
+          username: ${{secrets.MAIL_USERNAME}}
+          password: ${{secrets.MAIL_PASSWORD}}
+          subject: Nightly jkd11 Failed (Akka)
+          to: akka.official@gmail.com
+          from: Akka CI (GHActions)
+          body: |
+            Nightly jkd11 of ${{github.repository}} failed!
+            https://github.com/${{github.repository}}/actions/runs/${{github.run_id}}

.github/workflows/nightly-jdk8-scala2.13.yml

@@ -0,0 +1,47 @@
+name: Nightly jdk8/scala2.13
+on:
+  schedule:
+    - cron:  '0 20 * * *'
+
+jobs:
+  compile-and-test:
+    name: Compile and test
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Set up JDK 8
+        uses: olafurpg/setup-scala@v10
+        with:
+          java-version: adopt@1.8.0
+
+      - name: Cache Coursier cache
+        uses: coursier/cache-action@v6.2
+
+      - name: Compile and test for JDK8 (scala2.13)
+        run: |-
+          # TODO: restore -Dakka.test.multi-node.java=/usr/lib/jvm/jdk8u192-b12/bin/java
+          sbt -jvm-opts .jvmopts-ci \
+            -Dakka.ci-server=true \
+            -Dakka.build.scalaVersion=2.13.3 \
+            -Dakka.test.timefactor=1 \
+            -Dakka.cluster.assert=on \
+            clean compile test doc
+
+      - name: Email on failure
+        if: ${{ failure() }}
+        uses: dawidd6/action-send-mail@v3
+        with:
+          server_address: smtp.gmail.com
+          server_port: 465
+          username: ${{secrets.MAIL_USERNAME}}
+          password: ${{secrets.MAIL_PASSWORD}}
+          subject: Nightly jdk8/scala2.13 Failed (Akka)
+          to: akka.official@gmail.com
+          from: Akka CI (GHActions)
+          body: |
+            Nightly jdk8/scala2.13 of ${{github.repository}} failed!
+            https://github.com/${{github.repository}}/actions/runs/${{github.run_id}}

.github/workflows/nightly-jdk8.yml

@@ -0,0 +1,52 @@
+name: Nightly jkd8
+
+on:
+  schedule:
+    - cron:  '0 4,21 * * *'
+
+jobs:
+  compile-and-test:
+    name: Compile and test
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Set up JDK 8
+        uses: olafurpg/setup-scala@v10
+        with:
+          java-version: adopt@$1.8.0
+
+      - name: Cache Coursier cache
+        uses: coursier/cache-action@v6.2
+
+      - name: Compile and test for JDK ${{ matrix.JABBA_JDK }}, Scala ${{ matrix.SCALA_VERSION }}
+        run: |-
+          ## TODO: restore the multi-node tests 
+          sbt -jvm-opts .jvmopts-ci \
+            -Dakka.ci-server=true \
+            -Dakka.test.timefactor=1 \
+            -Dakka.cluster.assert=on \
+            -Dakka.test.metrics.reporters.0=console \
+            -Dakka.test.metrics.reporters.1=graphit \
+            -Dakka.test.metrics.reporter.graphite.prefix=jenkins \
+            -Dakka.test.metrics.reporter.graphite.host=54.72.154.120 \
+            -Dakka.sbt.statsd=false \
+            clean update whitesourceUpdate whitesourceCheckPolicies test:compile test publishLocal publishM2
+
+      - name: Email on failure
+        if: ${{ failure() }}
+        uses: dawidd6/action-send-mail@v3
+        with:
+          server_address: smtp.gmail.com
+          server_port: 465
+          username: ${{secrets.MAIL_USERNAME}}
+          password: ${{secrets.MAIL_PASSWORD}}
+          subject: Nightly jdk8 Failed (Akka)
+          to: akka.official@gmail.com
+          from: Akka CI (GHActions)
+          body: |
+            Nightly jdk8 of ${{github.repository}} failed!
+            https://github.com/${{github.repository}}/actions/runs/${{github.run_id}}