Fixes #901: mock2 doesn't update wildcard value

[tiffanyfay]

Fixes #901

Summary of changes:

• Make copy of namespace

Testing done:

• Created task with mock2 and looked at file output.
  Before:

tail /tmp/snap_published_mock_file_orig.log    ✭
2016-05-05 16:32:31.945949686 -0700 PDT|/intel/mock/host9/baz|83
2016-05-05 16:32:31.945950847 -0700 PDT|/intel/mock/host9/baz|89
2016-05-05 16:32:31.945951236 -0700 PDT|/intel/mock/host9/baz|67
2016-05-05 16:32:31.945952907 -0700 PDT|/intel/mock/host9/baz|71
2016-05-05 16:32:31.945953295 -0700 PDT|/intel/mock/host9/baz|68
2016-05-05 16:32:31.945953668 -0700 PDT|/intel/mock/host9/baz|80
2016-05-05 16:32:31.945954072 -0700 PDT|/intel/mock/host9/baz|72
2016-05-05 16:32:31.945955032 -0700 PDT|/intel/mock/host9/baz|88
2016-05-05 16:32:31.94595542 -0700 PDT|/intel/mock/host9/baz|83
2016-05-05 16:32:31.945955808 -0700 PDT|/intel/mock/host9/baz|83

After:

tail /tmp/snap_published_mock_file.log   130 ↵ ✭
2016-05-05 16:44:53.121801654 -0700 PDT|/intel/mock/host2/baz|89
2016-05-05 16:44:53.121802752 -0700 PDT|/intel/mock/host3/baz|78
2016-05-05 16:44:53.121803272 -0700 PDT|/intel/mock/host4/baz|70
2016-05-05 16:44:53.121809668 -0700 PDT|/intel/mock/host5/baz|85
2016-05-05 16:44:53.121810209 -0700 PDT|/intel/mock/host6/baz|65
2016-05-05 16:44:53.121810687 -0700 PDT|/intel/mock/host7/baz|87
2016-05-05 16:44:53.121811158 -0700 PDT|/intel/mock/host8/baz|87
2016-05-05 16:44:53.121812339 -0700 PDT|/intel/mock/host9/baz|78
2016-05-05 16:44:53.121812867 -0700 PDT|/intel/mock/bar|88

@intelsdi-x/snap-maintainers

[candysmurf]

👍 LGTM