Call getTracer only one time into BinaryOperationWithCst

- It will avoid several calls to ThreadConfig.

Change-Id: I4387c65fceacfc2b7d96f04fec03f2619628ad42
Clone VirtualMethodsMarker when possible

This avoids populating the TreeSet and saves a little more than 40%
of the time to unify JMethodIds.

Change-Id: I303708ce7215316f88a102115aaba8cbe61f669f
Merge "Clone VirtualMethodsMarker when possible" into ub-jack
Change comparison of JMethodId in VirtualMethodMarker.

For a faster one. This allows to have MethodIdMerger about 5 times
faster.

Change-Id: I35f970a02d1bbd3928de2a52bda6089960187100