Modifying mr pomfile to fix docker image issue.
Issue-ID: DMAAP-155
Change-Id: I3dfb64f922bbee19a8b24162fa8c6933ac81abee
Signed-off-by: sg481n <sg481n@att.com>
                                                        </execution>
                                        <execution>
                                                <id>copy-docker-file</id>
-                                               <phase>package</phase>
+                                               <phase>prepare-package</phase>
                                                <goals>
                                                        <goal>copy-resources</goal>
                                                </goals>