Remove default values for input parameters in virtual functions

[dsuponitskiy]

example: MakeCKKSPackedPlaintext() in src/pke/include/cryptocontext.h
This may become an issue as the overriders of virtual functions do not acquire the default arguments from the base class declarations, and when the virtual function call is made, the default arguments are decided based on the static type of the object.

[dsuponitskiy]

The following virtual functions have default values for input parameters:
EvalBootstrapSetup()
EvalSumRows()
EvalSumRowsKeyGen()
KeyGen()
MakeCKKSPackedPlaintext()
LevelReduce()
LevelReduceInPlace()
ModReduceInternal()
ModReduceInternalInPlace()
MultiAddEvalAutomorphismKeys()
MultiAddEvalKeys()
MultiAddEvalMultKeys()
MultiAddEvalSumKeys()
MultiAddPubKeys()
MultiEvalAtIndexKeyGen()
MultiEvalAutomorphismKeyGen()
MultiMultEvalKey()
MultipartyKeyGen()
PrecomputeCRTTables()
ReEncrypt()

[dsuponitskiy]

The work is done. All code changes are in the dev branch.