Fix Bmv2 related issues

- fix pom issues introduced in ONOS-7251
- fix error-prone detected issue
- fix artifactId naming

Change-Id: I4711c14ec25ed83a6e9071c9a0f8a2d606dad877
diff --git a/protocols/pom.xml b/protocols/pom.xml
index d311ebb..4984f3a 100644
--- a/protocols/pom.xml
+++ b/protocols/pom.xml
@@ -47,6 +47,7 @@
         <module>gnmi/stub</module>
         <module>p4runtime</module>
         <module>xmpp</module>
+        <module>bmv2</module>
     </modules>
 
     <dependencies>