COMP: Explicit Instantiation Thresholding

Change-Id: I1d5d9aa90f119d7fbb08825e5195eae1bf5f6fa9
COMP: Explicit Instantiation for RegistrationCommon

Change-Id: Ifdc5839799c69f850c37996aa7ed2cc7d8b77081
COMP: Explicit Instantiation FEMRegistration

Change-Id: Ib8cc74ffd17dd91b795e58e60542c1464d158e02