Use the releng top pom.xml file as parent.

Change-Id: I5f60642a8841773abeb70e783c7ba3d06bad2a44
Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>

pom.xml

diff --git a/pom.xml b/pom.xml
index f1f1f4c..223016e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,9 +4,9 @@
 	xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
 	<modelVersion>4.0.0</modelVersion>
 	<parent>
-		<artifactId>dltk</artifactId>
+		<artifactId>dltk.build.all</artifactId>
 		<version>5.7.2-SNAPSHOT</version>
-		<relativePath>../org.eclipse.dltk.releng/build/pom.xml</relativePath>
+		<relativePath>../org.eclipse.dltk.releng/pom.xml</relativePath>
 		<groupId>org.eclipse.dltk</groupId>
 	</parent>
 	<groupId>org.eclipse.dltk.ruby</groupId>