morph-rc1.5: build and deploy config - revert JDK-8 for SAL

.gitlab-ci.yml

@@ -2,6 +2,7 @@
 
 variables:
   MAVEN_IMAGE: "maven:3.8.1-jdk-11"
+  MAVEN_IMAGE_JDK_8: "maven:3.5.2-jdk-8"
   LOCAL_REPO: "127.0.0.1:5000"
 
   DOCKER_REPO: "gitlab.ow2.org:4567"
@@ -36,7 +37,7 @@ stages:
 
 build:scheduling-abstraction-layer:
   stage: build
-  image: $MAVEN_IMAGE
+  image: $MAVEN_IMAGE_JDK_8
   script:
     - $SCHEDULING_ABSTRACTION_LAYER_CLI clean install
   artifacts:
@@ -111,7 +112,7 @@ deploy:persistent-storage-activemq:
 
 deploy:scheduling-abstraction-layer:
   stage: deploy
-  image: $MAVEN_IMAGE
+  image: $MAVEN_IMAGE_JDK_8
   only:
     - master
     - morphemic-rc1.5