Use Maven wrapper for build

Build using Maven Wrapper and OpenJDK Docker image.

.gitlab-ci.yml

@@ -8,7 +8,7 @@ stages:
   - package
   - deploy
 
-image: maven:3.8.1-openjdk-11
+image: openjdk:11-jdk-slim
 
 variables:
   MAVEN_OPTS: "-Dmaven.repo.local=.m2/repository"
@@ -23,27 +23,27 @@ cache:
 build-data-collection:
   stage: build
   script:
-    - mvn $MAVEN_CLI_OPTS_DATA_COLLECTION_POM_FILE compile
+    - ./mvnw $MAVEN_CLI_OPTS_DATA_COLLECTION_POM_FILE compile
 
 build-webapp:
   stage: build
   script:
-    - mvn $MAVEN_CLI_OPTS_WEBAPP_POM_FILE compile
+    - ./mvnw $MAVEN_CLI_OPTS_WEBAPP_POM_FILE compile
 
 test-data-collection:
   stage: test
   script:
-    - mvn $MAVEN_CLI_OPTS_DATA_COLLECTION_POM_FILE test
+    - ./mvnw $MAVEN_CLI_OPTS_DATA_COLLECTION_POM_FILE test
 
 test-webapp:
   stage: test
   script:
-    - mvn $MAVEN_CLI_OPTS_WEBAPP_POM_FILE test
+    - ./mvnw $MAVEN_CLI_OPTS_WEBAPP_POM_FILE test
 
 .jar-data-collection-common:
   stage: package
   script:
-    - mvn $MAVEN_CLI_OPTS_DATA_COLLECTION_POM_FILE package
+    - ./mvnw $MAVEN_CLI_OPTS_DATA_COLLECTION_POM_FILE package
   artifacts:
     paths:
       - data-collection/target/*.jar
@@ -67,7 +67,7 @@ jar-data-collection:dev:
 .war-webapp-common:
   stage: package
   script:
-    - mvn $MAVEN_CLI_OPTS_WEBAPP_POM_FILE package
+    - ./mvnw $MAVEN_CLI_OPTS_WEBAPP_POM_FILE package
   artifacts:
     paths:
       - webapp/target/*.war