Resolving following issues:

- f_generateLocalResource - error for contentInstance resource generation
- f_getResourceIndex - error when CSEBase is the target resource and unstructured format address is used
- implementation of several functions to process CREATE, UPDATE, RETRIEVE and DELETE requests
- modification of AE_GEN and AE_DMR test cases groups to use the above-mentioned functions

Signed-off-by: reinaortega <miguelangel.reinaortega@etsi.org>