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/shell/pom.xml b/shell/pom.xml
index 1d962ce..70c50d6 100644
--- a/shell/pom.xml
+++ b/shell/pom.xml
@@ -21,6 +21,7 @@
     <groupId>org.apache.felix</groupId>
     <artifactId>felix</artifactId>
     <version>0.9.0-incubator-SNAPSHOT</version>
+    <relativePath>../pom/pom.xml</relativePath>
   </parent>
   <modelVersion>4.0.0</modelVersion>
   <packaging>bundle</packaging>