Fix CI by excluding drast submodule from build and test.

.gitlab-ci.yml

@@ -15,7 +15,7 @@ build:
     - dockered
   stage: build
   script:
-    - ./gradlew --console=plain --build-cache assemble
+    - ./gradlew --console=plain --build-cache assemble -x ":drast:assemble"
   cache:
     key: "$CI_COMMIT_REF_NAME"
     policy: push
@@ -29,7 +29,7 @@ test:
     - dockered
   stage: test
   script:
-    - ./gradlew --continue --console=plain check
+    - ./gradlew --continue --console=plain check -x ":drast:check"
   cache:
     key: "$CI_COMMIT_REF_NAME"
     policy: pull