Teach NetworkWrapper to work with entire test cases.
Teach NetworkWrapper to work with entire test cases.

Currently NetworkWrapper does nothing when presented with a test case
class. Make it work.

BUG=none
TEST=Verify cbuildbot_metadata_unittest.py skips the right tests now.

Change-Id: I35027cfb6c411f3496b49be5984bbae2c56bdb29
Reviewed-on: https://chromium-review.googlesource.com/202624
Reviewed-by: Aviv Keshet <178e8ae417efbe404feca7ab4cb8f0ba8c109369@chromium.org>
Commit-Queue: David James <f231dc574bbeb62604660cbc162d1b8642a0a3af@chromium.org>
Tested-by: David James <f231dc574bbeb62604660cbc162d1b8642a0a3af@chromium.org>

chadversary/chromiumos.chromite,bpsinc-native/src_third_party_chromite,chadversary/chromiumos.chromite,bpsinc-native/src_third_party_chromite,bpsinc-native/src_third_party_chromite