glusterfsd: is_mgmt_rpc_reconnect should not be `char` but gf_boolean_t

Change-Id: I35c4dc040ebb5e926c7f54d823d1c81b1228bd4f
BUG: 763046
Signed-off-by: Harshavardhana <harsha@harshavardhana.net>
Reviewed-on: http://review.gluster.org/5345
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>