CI: Add cleanWs to cleanup steps in jenkinsfiles

We're at the point where there are enough Jenkins jobs for
Asterisk branches than even cleaned checkouts of Asterisk
will add up to more disk space than is available on the
in-memory workspace mount.  Since we archive all relevent
artifacts anyway, there's no need to keep the workspace
around after the job finishes, whether it succeeds or fails.

Change-Id: I1cd3b73ebb045a987df0f62526d152a510210c39

tests/CI/gates.jenkinsfile

@@ -54,7 +54,7 @@ pipeline {
 				onUnstable: false
 			]
 	}
-	
+
 	agent {
 		/* All of the stages need to be performed on a docker host */
 		label "swdev-docker"
@@ -78,9 +78,9 @@ pipeline {
 					manager.createSummary("/plugin/workflow-job/images/48x48/pipelinejob.png").appendText("Docker Host: ${NODE_NAME}", false)
 
 					stage ("Checkout") {
-						sh "sudo chown -R jenkins:users ."  
+						sh "sudo chown -R jenkins:users ."
 						env.GERRIT_PROJECT_URL = env.GIT_URL.replaceAll(/[^\/]+$/, env.GERRIT_PROJECT)
-					
+
 						/*
 						 * Jenkins has already automatically checked out the base branch
 						 * for this change but we now need to check out the change itself
@@ -191,7 +191,7 @@ pipeline {
 									}
 
 									sh "sudo rm -rf ${groupDir} || : "
-									
+
 									withCredentials([usernamePassword(credentialsId: "${JENKINS_GERRIT_CREDS}",
 										passwordVariable: 'GERRIT_USER_PW', usernameVariable: 'GERRIT_USER_NAME')]) {
 										checkout scm: [$class: 'GitSCM',
@@ -237,8 +237,7 @@ pipeline {
 	}
 	post {
 		cleanup {
-			sh "sudo make distclean >/dev/null 2>&1 || : "
-			sh "sudo rm -rf tests/CI/output >/dev/null 2>&1 || : "
+            cleanWs deleteDirs: true, notFailBuild: true
 		}
 		/*
 		 * The Gerrit Trigger will automatically post the "Verified" results back

tests/CI/periodics-daily.jenkinsfile

@@ -157,8 +157,7 @@ pipeline {
 	}
 	post {
 		cleanup {
-			sh "sudo make distclean >/dev/null 2>&1 || : "
-			sh "sudo rm -rf tests/CI/output >/dev/null 2>&1 || : "
+            cleanWs deleteDirs: true, notFailBuild: true
 		}
 		success {
 			echo "Reporting ${currentBuild.currentResult} Passed"

tests/CI/ref_debug.jenkinsfile

@@ -26,7 +26,7 @@ pipeline {
 	triggers {
 		cron 'H H(0-4) * * 0'
 	}
-	
+
 	agent {
 		/* All of the stages need to be performed on a docker host */
 		label "swdev-docker"
@@ -40,7 +40,7 @@ pipeline {
 					manager.createSummary("/plugin/workflow-job/images/48x48/pipelinejob.png").appendText("Docker Host: ${NODE_NAME}", false)
 
 					stage ("Checkout") {
-						sh "sudo chown -R jenkins:users ."  
+						sh "sudo chown -R jenkins:users ."
 						sh "printenv | sort"
 						sh "sudo tests/CI/setupJenkinsEnvironment.sh"
 					}
@@ -93,7 +93,7 @@ pipeline {
 									}
 
 									sh "sudo rm -rf ${groupDir} || : "
-									
+
 									checkout scm: [$class: 'GitSCM',
 										branches: [[name: "${BRANCH_NAME}"]],
 											extensions: [
@@ -127,8 +127,7 @@ pipeline {
 	}
 	post {
 		cleanup {
-			sh "sudo make distclean >/dev/null 2>&1 || : "
-			sh "sudo rm -rf tests/CI/output >/dev/null 2>&1 || : "
+            cleanWs deleteDirs: true, notFailBuild: true
 		}
 		success {
 			echo "Reporting ${currentBuild.currentResult} Passed"

tests/CI/unittests.jenkinsfile

@@ -181,8 +181,7 @@ pipeline {
 	}
 	post {
 		cleanup {
-			sh "sudo make distclean >/dev/null 2>&1 || : "
-			sh "sudo rm -rf tests/CI/output >/dev/null 2>&1 || : "
+            cleanWs deleteDirs: true, notFailBuild: true
 		}
 		/*
 		 * The Gerrit Trigger will automatically post the "Verified" results back