Replaced staging with snapshots

- From now on we can check compatibility with snapshot dependencies if they
  deploy to maven central snapshots. Maven is smart enough to know if it
  should check snapshot of "final" central repository.

Signed-off-by: David Matějček <david.matejcek@omnifish.ee>

Author: dmatej

Jenkinsfile

@@ -33,7 +33,7 @@ pipeline {
   stages {
     stage('build') {
       steps {
-        sh 'mvn -Pstaging,all-tests,dash-licenses clean install'
+        sh 'mvn -Psnapshots,all-tests,dash-licenses clean install'
         junit testResults: '**/target/surefire-reports/*.xml', allowEmptyResults: true
         archiveArtifacts artifacts: 'dash-summary.txt'