By default, the mongo command connection address is '127.0.0.1:27017'.
If we change mongodb_port, It cause the handle 'Checking current
replication status' always connect to '127.0.0.1:27017'. So we need
add options like '--host' and '--port'.
Change-Id: I172ef3d19ff2bea97db3a5207c1a984cd188ceba
Signed-off-by: ZijianGuo <guozijn@gmail.com>