MB-8299: renamed vbucket_map of remote_bucket to capi_vbucket_map

So that there's less confusion about what this field holds

Change-Id: I0978a670ed0cb6da5060aa04bd39f61877b51ed3
Reviewed-on: http://review.couchbase.org/27404
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>
MB-8299: added remote_bucket info for remote memcached access

We also change file name of remote clusters info cache file. I.e. so
that changed remote_bucket_node record does not cause problems if we
read old cache from 2.1.0

Change-Id: I967e5ac0d81ce687a354aea9e0e6bed1c11edeb5
Reviewed-on: http://review.couchbase.org/27405
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
MB-8604 changed REST api url in cluster_connect

...for default bucket creation call to adhere to the
changes made for MB-7720

Change-Id: I488deb852acf188c8e4ff6dfc1e379c6f96f633a
Reviewed-on: http://review.couchbase.org/27430
Tested-by: Artem Stemkovski <artem@couchbase.com>
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>
Merge remote-tracking branch 'gerrit/2.2.0' into HEAD

MB-8604 changed REST api url in cluster_connect
MB-8299: added remote_bucket info for remote memcached access
MB-8299: renamed vbucket_map of remote_bucket to capi_vbucket_map

Change-Id: Ib328ca7c0838468f73a6c92bc65e65faf1c811e2