LookNFeel - Minor style updates to the shell.
Destroy default content view on cascade when deleting environment

Also validate the default content_view explicitly. Here is what happened
without this changes:

1. Create environment (default content view and content_view_version
was crated)
2. Delete the environment (`content_view` stayed there because
`:dependent=> :destroy` was missing)
3. When creating an environment with the same name, the content_view
was not created, because another content view with the same name
already existed. However, because the content_view was being saved as
part of saving content_view_version, the exception was not thrown (and
the content_view_version was saved successfully without association to
any content_view)
4. When promoting some time after this incident (that happened
unnoticed), "nil pointer exception" occurred while promoting, because
the default content view was not there.
Merge pull request #1743 from iNecas/default-content-view-dependent-destroy

Destroy default content view on cascade when deleting environment
Merge pull request #1753 from ehelms/minor-ui-fixes

LookNFeel - Minor style updates to the shell.
Do not use two %s in translation string

Introduced in commit b435a7a2.
Two %s are hard to translate.
Addressing:
Found 1 malformed strings
app/models/glue/provider.rb: _("Subscription manifest %s for provider '%s' failed") %
RPM build errors:
error: Bad exit status from /var/tmp/rpm-tmp.E0AL96 (%build)
    Bad exit status from /var/tmp/rpm-tmp.E0AL96 (%build)

Additionally building string from two translated strings are very often hard for translators
to manage.
See BZ 886718 for example of such case.
Merge pull request #1757 from xsuchy/pull-req-b435a7a2-fix3

Do not use two %s in translation string
spec - sorting, cleaning and indenting
spec - enabling scl for rhel6
Merge pull request #1758 from lzap/scl-katello

Katello SCL for RHEL6
915289 - Fixing missing fonts
spec - enabling scl for rhel6 - fixing F18
Merge pull request #1759 from daviddavis/font404

915289 - Fixing missing fonts
Merge pull request #1760 from lzap/scl-katello

spec - enabling scl for rhel6 - fixing F18
relax-org-name - only block <, >, and / in org names
Merge pull request #1755 from thomasmckay/relax-org-name

relax-org-name - allow more flexible org naming now that there are labels
Merge branch 'master', remote-tracking branch 'katello' into rails32-fixes
Rails32 - Adding ugly hack to run minitests with the 32 gemfile.