config: do not duplicate sections when doing collocation

config: do not duplicate sections when doing collocation

Prior to this commit, when collocating a RGW and NFS on the same box the
ceph.conf layout was the following:

[client.rgw.rgw0]
host = mds0
host = rgw0
rgw frontends = civetweb port=192.168.15.50:8080
num_threads=100[client.rgw.mds0]
rgw frontends = civetweb port=192.168.15.70:8080 num_threads=100
rgw frontends = civetweb port=192.168.15.50:8080 num_threads=100
keyring = /var/lib/ceph/radosgw/test-rgw.mds0/keyring
keyring = /var/lib/ceph/radosgw/test-rgw.rgw0/keyring
rgw data = /var/lib/ceph/radosgw/test-rgw.rgw0
log file = /var/log/ceph/test-rgw-mds0.log
log file = /var/log/ceph/test-rgw-rgw0.log

[mds.mds0]
host = mds0

[global]
rgw override bucket index max shards = 16
fsid = 70e1d368-57b3-4978-b746-cbffce6e56b5
rgw bucket default quota max objects = 1638400
osd_pool_default_size = 1
public network = 192.168.15.0/24
mon host = 192.168.15.10,192.168.15.11,192.168.15.12
osd_pool_default_pg_num = 8
cluster network = 192.168.16.0/24

[mds.rgw0]
host = rgw0

[client.rgw.mds0]
host = mds0
rgw data = /var/lib/ceph/radosgw/test-rgw.mds0
keyring = /var/lib/ceph/radosgw/test-rgw.mds0/keyring
rgw frontends = civetweb port=192.168.15.70:8080 num_threads=100
log file = /var/log/ceph/test-rgw-mds0.log

Basically appending all the sections. This commits solves that.
Now the sections appear like this:

-bash-4.2# cat /etc/ceph/test.conf
[client.rgw.rgw0]
log file = /var/log/ceph/test-rgw-rgw0.log
host = rgw0
keyring = /var/lib/ceph/radosgw/test-rgw.rgw0/keyring
rgw frontends = civetweb port=192.168.15.50:8080 num_threads=100

[client.rgw.mds0]
log file = /var/log/ceph/test-rgw-mds0.log
host = mds0
keyring = /var/lib/ceph/radosgw/test-rgw.mds0/keyring
rgw frontends = civetweb port=192.168.15.70:8080 num_threads=100

[global]
cluster network = 192.168.16.0/24
mon host = 192.168.15.10,192.168.15.11,192.168.15.12
osd_pool_default_size = 1
public network = 192.168.15.0/24
rgw bucket default quota max objects = 1638400
osd_pool_default_pg_num = 8
rgw override bucket index max shards = 16
fsid = 77a21980-3033-4174-9264-1abc7185bcb3

[mds.rgw0]
host = rgw0

[mds.mds0]
host = mds0

Signed-off-by: Sébastien Han <seb@redhat.com>