Remove memcache from NDB CMakeLists
Remove code under support-files that refer to ndb_memcache
Remove code under packaging that refer to ndb_memcache
Remove ndb memcache references from skiplists and collections
Remove ndb memcache from mysql-test-run.pl
Remove all storage/ndb/memcache
Remove all ndb-memcahe test suite
Remove memcache from LICENSE file

Reviewed by:  John Duncan <john.duncan@oracle.com>