Move the parent pom.xml into it's own subproject and fix some minor issues

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@555357 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/installers/pom.xml b/installers/pom.xml
index 9c9d711..8b6e628 100644
--- a/installers/pom.xml
+++ b/installers/pom.xml
@@ -5,6 +5,7 @@
     <groupId>org.apache.felix</groupId>
     <artifactId>felix</artifactId>
     <version>0.9.0-incubator-SNAPSHOT</version>
+    <relativePath>../pom/pom.xml</relativePath>
   </parent>
   <packaging>jar</packaging>
   <name>Apache Felix Installers</name>