Use version 2.5.3 parent poms

Update to use latest released London parent poms v2.5.3

Issue-ID: CCSDK-3813
Signed-off-by: Dan Timoney <dtimoney@att.com>
Change-Id: I18cec37df173af2ed51d3b90bd2ebb7de2ec1334
diff --git a/saltstack-server/pom.xml b/saltstack-server/pom.xml
index f5ec32e..bdcff9c 100644
--- a/saltstack-server/pom.xml
+++ b/saltstack-server/pom.xml
@@ -22,9 +22,9 @@
         <plugins>
 
             <plugin>
-                <groupId>org.codehaus.groovy.maven</groupId>
-                <artifactId>gmaven-plugin</artifactId>
-                <version>1.0</version>
+                <groupId>org.codehaus.gmaven</groupId>
+                <artifactId>groovy-maven-plugin</artifactId>
+                <version>2.1.1</version>
                 <executions>
                     <execution>
                         <phase>validate</phase>