Use releng top pom.xml as parent.

Change-Id: I9dce6096b35aec99be91c250151c2be29b4a7b8a
Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>

pom.xml

diff --git a/pom.xml b/pom.xml
index 757d96f..c12579a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,9 +5,9 @@
 	<modelVersion>4.0.0</modelVersion>
 	<parent>
 		<groupId>org.eclipse.dltk</groupId>
-		<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>
 	</parent>
 	<groupId>org.eclipse.dltk.python</groupId>
 	<artifactId>python</artifactId>