fix error handing in swauth tools

The swauth tools did not handle an invalid admin_url, so it just failed
printing the stacktrace, which is not useful to end users.
This fix catches the exception and prints an error message that can
help user solve the issue.

Change-Id: I806c1cf191b5921e904b155f65cdbde5f2aac695
Signed-off-by: Thiago da Silva <thiago@redhat.com>
Reviewed-on: http://review.gluster.org/6431
Reviewed-by: Luis Pabon <lpabon@redhat.com>
Tested-by: Luis Pabon <lpabon@redhat.com>
Reviewed-on: http://review.gluster.org/6707
Reviewed-by: Chetan Risbud <crisbud@redhat.com>
Tested-by: Chetan Risbud <crisbud@redhat.com>
Release 1.10.0-3

Change-Id: I33f8e78c80da4609796c109a983c78e65170ee33
Signed-off-by: Chetan Risbud <crisbud@redhat.com>
Reviewed-on: http://review.gluster.org/6710
Fixed tox issues with new versino of Pip

BUG: https://bugs.launchpad.net/bugs/1268017

Change-Id: Ifce6cc992e49f6824c75d07069b335e208e960d8
Signed-off-by: Luis Pabon <lpabon@redhat.com>
Reviewed-on: http://review.gluster.org/6702