Echo debug env variables.

Signed-off-by: Boris Djalal <boris.djalal@eurecom.fr>

ci-scripts/test-boris-Jenkinsfile

@@ -350,6 +350,10 @@ pipeline {
 		echo "PROJECT_NAME = ${PROJECT_NAME}"		
 		echo "BUILD_NUMBER = ${BUILD_NUMBER}"		
 		echo "BUILD_STAGE_STATUS = ${BUILD_STAGE_STATUS}"
+		echo "GIT_URL = ${GIT_URL}"
+		echo "env.gitlabSourceBranch = ${env.gitlabSourceBranch}"
+		echo "env.gitlabMergeRequestLastCommit = ${env.gitlabMergeRequestLastCommit}"
+		echo "env.gitlabTargetBranch = ${env.gitlabTargetBranch}"		
                 emailext attachmentsPattern: '*results*.html',
                      body: '''Hi,
 Here are attached HTML report files for $PROJECT_NAME - Build # $BUILD_NUMBER - $BUILD_STAGE_STATUS