modified the depends openstack-metering version

Currently, the latest openstack-common cookbook version is 0.4.3
The depends "openstack-common" version in the metadata.rb is
" ~> 0.3.0". After uploading the openstack-common, I upload the
"openstack-metering" cookbook. It output the dependency error.
Modified the depends "openstack-common" version in metadata.rb
could fix it.

Fixes: bug #1210033
Implements: modified the depends "openstack-common" version number
Change-Id: I935f4659c5e0aaee632b114c90a60a7613b22e7e