Update griefed/baseimage-ubuntu-jdk-8 Docker tag to v2.0.3

This MR contains the following updates:

Package	Type	Update	Change
griefed/baseimage-ubuntu-jdk-8	image	patch	2.0.1 -> 2.0.3
griefed/baseimage-ubuntu-jdk-8	final	patch	2.0.1 -> 2.0.3
griefed/baseimage-ubuntu-jdk-8	stage	patch	2.0.1 -> 2.0.3

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.gitlab-ci.yml

@@ -125,7 +125,7 @@ secret_detection:
     - rm "$CI_COMMIT_SHA"_commit_list.txt
 
 Gradle Test:
-  image: griefed/baseimage-ubuntu-jdk-8:2.0.1
+  image: griefed/baseimage-ubuntu-jdk-8:2.0.3
   stage: Tests
   before_script:
     - echo "**** Running in $CI_JOB_ID ****"
@@ -195,7 +195,7 @@ Gradle Test:
 #      - $CI_SERVER_HOST == "git.griefed.de"
 
 Gradle Dependency-Checks:
-  image: griefed/baseimage-ubuntu-jdk-8:2.0.1
+  image: griefed/baseimage-ubuntu-jdk-8:2.0.3
   stage: Other
   allow_failure: true
   before_script: