Fix the version of the Docker image for build

Author: mmoqui

Jenkinsfile

@@ -3,7 +3,7 @@ import java.util.regex.Matcher
 node {
   catchError {
     def version
-    docker.image('silverpeas/silverbuild:java-11')
+    docker.image('silverpeas/silverbuild')
         .inside('-v $HOME/.m2:/home/silverbuild/.m2 -v $HOME/.gitconfig:/home/silverbuild/.gitconfig -v $HOME/.ssh:/home/silverbuild/.ssh -v $HOME/.gnupg:/home/silverbuild/.gnupg') {
       stage('Preparation') {
         checkout scm
@@ -71,4 +71,4 @@ def isLockFileExisting(lockFilePath) {
     return exitCode == 0
   }
   return false
-}
+}