Add API descriptions of cynara-configuration calls
Add API descriptions of cynara-configuration calls

Introduce three new API calls specific for
cynara_configuration creation, destruction and cache size setting.

Change-Id: Id24175765ebff71b18bfdd4fd94c9a671c0035dc

pohly/cynara,pohly/cynara,Samsung/cynara,Samsung/cynara,pohly/cynara,Samsung/cynara