Fetch exception message correctly

To prevent the message:
DeprecationWarning: BaseException.message has been deprecated as of
Python 2.6

We are not using the .message attribute of exceptions anymore, but the
str() function.

Change-Id: Ie93a6d28e351af57fb6b6ec956fce9e23ea00267
Signed-off-by: Fabian Deutsch <fabiand@fedoraproject.org>
setup: Don't provide a bridge option anymore

Previously it was possible to create bridges from within the TUI, this
is not possible anymore (through the TUI), because it is not needed -
even making it more difficult - to let vdsm rollout the desired network
setup.

Change-Id: If451d5de636bafbfeeaaef5e11de46a290ac0b70
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1063951
Signed-off-by: Fabian Deutsch <fabiand@fedoraproject.org>
ui: Adjust colors

Previously text and buttons colors could be confusing to users.
Disabled buttons could appear in red, which isn't very intuitive.

Now disabled buttons are displayed in gray on a terminal, and in white
on a pty (ssh).

Change-Id: Iadf93f590efcdeeb41dde4031725adda90293452
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1106918
Signed-off-by: Fabian Deutsch <fabiand@fedoraproject.org>
selinux: Add firewalld rule for el7

The tuned line was removed intentionally, it was a dupe.

Change-Id: I64fe590130f19d9795b39a3ae8d76e0696187b52
Signed-off-by: Fabian Deutsch <fabiand@fedoraproject.org>