Revert "gitlab-ci: test step skip assemble as it is in test"

This reverts commit a82d07a.
assemble is needed, as is creates a .tar file which is used
for the deploy step.

Author: rp-

.gitlab-ci.yml

@@ -174,6 +174,7 @@ test:
     - if: $CI_COMMIT_BRANCH == 'jenkins'
   script:
     - ./gradlew -PversionOverride= checkstyleMain
+    - ./gradlew -PversionOverride= assemble
     - JAVA_OPTS="-ea" ./gradlew -PversionOverride= -PCoverageReport=true test
     - awk -F"," '{ instructions += $4 + $5; covered += $5 } END { print "Total", 100*covered/instructions, "% covered" }' build/reports/jacoco/test/jacocoTestReport.csv
   coverage: '/Total (\d+.\d+) % covered/'