FIX attrribute name as only key (unit test pending to be adapted)
ADD unit test in mongoUpdateContext_test working except 3 related with Md and IDs that need carefull examination
FIX all unit test ok
FIX unit tests and test harness
ADD entry to changex next release
ADD test harness
FIX issues raised during PR
Merge pull request #644 from telefonicaid/feature/640_attribute_name_only_key

Use attribute name as only attribute identification (type is not used anymore)