remove <version>${genius.version} from GAV

remove <version>${genius.version} from GAV

because this is inherited from <parent> and avoid this:

[WARNING] Some problems were encountered while building the effective model for org.opendaylight.genius:interfacemanager-shell:bundle:0.4.2-SNAPSHOT
[WARNING] 'version' contains an expression but should be a constant. @ org.opendaylight.genius:interfacemanager-shell:${genius.version}, /w/workspace/integration-multipatch-test-fluorine/patch_tester/genius/interfacemanager/interfacemanager-shell/pom.xml, line 22, column 14

Change-Id: Ibb8b91b06ef63fb8292e02503b4c711069650e1b
Signed-off-by: Michael Vorburger <vorburger@redhat.com>