[Build] Fix collection of the first test results

Check if results for other test configurations have been published yet
and if the corresponding directory already exists on the storage server.

Additionally use the eclipse-platform instead of the eclipse-SDK
product. The former is smaller, but sufficient for the executed tasks.

Fixes
- #3386

Author: HannesWell

JenkinsJobs/Releng/collectTestResults.jenkinsfile

@@ -3,7 +3,7 @@ pipeline {
 		skipDefaultCheckout()
 		timestamps()
 		timeout(time: 30, unit: 'MINUTES')
-		buildDiscarder(logRotator(numToKeepStr:'5'))
+		buildDiscarder(logRotator(numToKeepStr:'15'))
 		disableConcurrentBuilds()
 	}
 	agent {
@@ -51,7 +51,12 @@ pipeline {
 						mkdir -p "${testResultsDir}"
 
 						# Fetch previously collected test results and already generated files (that would otherwise be re-generated)
-						rsync -avzh --exclude="*_${triggeringJob}_*" [email protected]:${EP_ECLIPSE_DROPS}/${buildID}/testresults/xml ${buildDirectory}/testresults
+						allTestResultsXMLDirectory="${EP_ECLIPSE_DROPS}/${buildID}/testresults/xml"
+						if ssh [email protected] "[ -d '${allTestResultsXMLDirectory}' ]"; then
+							rsync -avzh --exclude="*_${triggeringJob}_*" [email protected]:${allTestResultsXMLDirectory} ${buildDirectory}/testresults
+						else
+							echo 'Test results of other configurations not yet published.'
+						fi
 
 						# ==========================================
 						# Collect results and overview from test-job
@@ -94,7 +99,7 @@ def installLatestEclipse(){
 			return [n, (v.startsWith('"') && v.endsWith('"') ? v.substring(1, v.length() - 1) : v)]
 		}
 	}
-	def eclipseURL = "https://download.eclipse.org/eclipse/downloads/drops4/${props.PREVIOUS_RELEASE_ID}/eclipse-SDK-${props.PREVIOUS_RELEASE_VER}-linux-gtk-x86_64.tar.gz"
+	def eclipseURL = "https://download.eclipse.org/eclipse/downloads/drops4/${props.PREVIOUS_RELEASE_ID}/eclipse-platform-${props.PREVIOUS_RELEASE_VER}-linux-gtk-x86_64.tar.gz"
 	return install('eclipse', eclipseURL) + '/eclipse --launcher.suppressErrors -nosplash -consolelog'
 }