dcache: use dcache build container

dcache-build.yml

+
+stages:
+  build:rpm
+#  build:deb
+#  build:tar
+
 variables:
   MAVEN_CLI_OPTS: "--batch-mode --errors --fail-at-end --show-version -DinstallAtEnd=true -DdeployAtEnd=true"
-  REPO_NAME: dcache
 
-image: maven:3.6.3-openjdk-11
 
 # Cache downloaded dependencies and plugins between builds.
 # To keep cache across branches add 'key: "$CI_JOB_NAME"'
@@ -11,7 +15,8 @@ cache:
   paths:
     - .m2/repository
 
-build:
-  stage: build
+rpm:
+  stage: build:rpm
+  image: dcache/maven-java11-rpm-build
   script:
-    - mvn $MAVEN_CLI_OPTS -am -pl packages/tar -P rpm,code-coverage clean package verify pmd:cpd com.github.spotbugs:spotbugs-maven-plugin:3.1.12:spotbugs
+    - mvn $MAVEN_CLI_OPTS -am -pl packages/fhs -P rpm