core: Remove GetEventNotificationMethodByType

GetEventNotificationMethodByTypeQuery is not used anywhere in
the code, and hence should be removed.

This patch removes the following:
1. The GetEventNotificationMethodByTypeQuery class.
2. The GetEventNotificationMethodByType constant representing
   it in VdcQueryType.
3. The GetEventNotificationMethodByTypeParameters class only used by
   the aforementioned query.
3. The getAllEventNotificationMethodByTppe() method in EvetDAO, its
   implementation, test and underlying stored procedure, as this
   method was only used by the aforementioned query.

Change-Id: Ib347d2f60c84924f2b3e3904066c3e9582e8f736
Signed-off-by: Allon Mureinik <amureini@redhat.com>