Consistently use camelCase in Gerrit Client

In the Gerrit Client classes that represent the JSON entities
retrieved from the server we have a mix of camelCase and
underscore_case method names. Make it consistent by always using
camelCase.

Change-Id: I5ba3a0e52bbfc6d1b9d224461b8a45952ab93b3a
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>

gerrit-gwtui/src/main/java/com/google/gerrit/client/api/RevisionGlue.java

@@ -29,7 +29,7 @@ public class RevisionGlue {
       ActionInfo action,
       ActionButton button) {
     RestApi api = ChangeApi.revision(
-          change.legacy_id().get(),
+          change.legacyId().get(),
           revision.name())
       .view(action.id());