Fixed duplicate/redundant .asc.asc sigs

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@918345 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/karaf/pom.xml b/karaf/pom.xml
index f18ebf3..c4deca7 100644
--- a/karaf/pom.xml
+++ b/karaf/pom.xml
@@ -945,6 +945,8 @@
                         <version>1.0-alpha-4</version>
                         <executions>
                             <execution>
+                                <id>sign-artifacts</id>
+                                <phase>verify</phase>
                                 <goals>
                                     <goal>sign</goal>
                                 </goals>