Add os-net-config dependency

I5f51ecb5c64fc9c13eabc16b2b43b5dda1b38d65 in tripleo-image-elements
added a dependency on the os-net-config element which installs
the os-net-config package but global requirements is missing
this package.

Change-Id: I62e19ec92fbcfa3c029aeecdeed08c1e58f19d7f
Bump glance_store to 0.1.9

There is an bug in glance_store https://bugs.launchpad.net/glance/+bug/1371040
which breaks glance using rbd driver, this patch updates glance_store
to >= 0.1.9 which fixes that issue.

Change-Id: I487e1b3b22e6ecbb04ff99a81f098e72e17cd842
Upgrade to pylint >=1.3.0

The .pylintrc used for neutron refers to checks added in pylint 1.3.0,
and aborts on earlier versions (from a quick experiment).

This change moves global requirements to pylint>=1.3.0.

Change-Id: I2795214f90c2338ef968210432565a978c1d636b
Merge "Bump glance_store to 0.1.9"
Merge "Add os-net-config dependency"
Merge "Upgrade to pylint >=1.3.0"