Merge pull request #20 from xenit-eu/VESPASLA-82

VESPASLA-82 correct signingkey property

signing.gradle

@@ -2,6 +2,6 @@ apply plugin: 'signing'
 
 signing {
     required { !version.toString().endsWith('SNAPSHOT') && gradle.taskGraph.hasTask("publish") }
-    useInMemoryPgpKeys(findProperty('signingKeyId'), findProperty('signingPassword'))
+    useInMemoryPgpKeys(findProperty('signingKey'), findProperty('signingPassword'))
     sign publishing.publications.mavenJava
 }