Make old devel packages names obsolete

Merging all devel rpms into single cynara-devel causes
all older devel packages to be obsolete.

Change-Id: I6e10c7c74f58dbf8c5ca676ce817382f2c801752
Release 0.4.2

Change-Id: I98e8bc31f89125fa7dd7a92b9feb7d93e24772c7