ovs-container: Obtain netmask information from subnet.
ovs-container: Obtain netmask information from subnet.

Fixes #2

Signed-off-by: Gurucharan Shetty <c4089df073b4e0e1342dd7f47682381cc38caa5c@nicira.com>

shettyg/ovn-docker,shettyg/ovn-docker,shettyg/ovn-docker