Polishing.

Extract docker credentials into properties file.

See #417

Author: mp911de

ci/pipeline.properties

@@ -1,24 +1,23 @@
 # Java versions
-java.main.tag=8u312-b07-jdk
-java.next.tag=11.0.13_8-jdk
-java.lts.tag=17.0.1_12-jdk
+java.main.tag=17.0.2_8-jdk
 
 # Docker container images - standard
 docker.java.main.image=eclipse-temurin:${java.main.tag}
-docker.java.next.image=eclipse-temurin:${java.next.tag}
-docker.java.lts.image=eclipse-temurin:${java.lts.tag}
 
 # Supported versions of MongoDB
-docker.mongodb.4.0.version=4.0.23
 docker.mongodb.4.4.version=4.4.4
 docker.mongodb.5.0.version=5.0.3
+
 # Supported versions of Redis
 docker.redis.6.version=6.2.4
+
 # Supported versions of Cassandra
-docker.cassandra.3.version=3.11.10
+docker.cassandra.3.version=3.11.11
+
 # Docker environment settings
 docker.java.inside.basic=-v $HOME:/tmp/jenkins-home
 docker.java.inside.docker=-u root -v /var/run/docker.sock:/var/run/docker.sock -v /usr/bin/docker:/usr/bin/docker -v $HOME:/tmp/jenkins-home
+
 # Credentials
 docker.registry=
 docker.credentials=hub.docker.com-springbuildmaster