Base UI: Optimum delay for wait_until_element func and some comment fixes
login UI: We now have Default location and exception fixes
navigation UI: Use wait_until_element to overcome timing issues
Fix tests UI: env accepts only alphanumeric & skip the bugs
Fix travis and add fixed org tests related to environments
Remove the unwanted inheritance
subnet & location tests UI: Raised bugs and added tests to be skiped
Merge pull request #1106 from tkolhar/test_cli

Added test for add-operatingsystem on ptable
Merge pull request #1100 from kbidarkar/fix-automation-tests2

Miscellaneous fixes for various automation UI failures.
Better CLI factory error exception message

Also adds a specific exception for CLI factory CLIFactoryError which is
raised when any entity could not be created via CLI.
Merge pull request #1109 from elyezer/cli-factory-error

Better CLI factory error exception message
Re-enabling Organization deletion tests via CLI.

Since most (if not all) Bugzilla issues related to org deletion are now
closed or ready for testing, it is safe to re-enable the CLI tests that
we had disabled before.

The Bugzilla issues are:

* https://bugzilla.redhat.com/show_bug.cgi?id=1061658
* https://bugzilla.redhat.com/show_bug.cgi?id=1076568
* https://bugzilla.redhat.com/show_bug.cgi?id=1096241
* https://bugzilla.redhat.com/show_bug.cgi?id=1100311
* https://bugzilla.redhat.com/show_bug.cgi?id=1120336

The modified tests were run against build:
 * Satellite-6.0.4-RHEL-6-20140730.0

```bash
$ nosetests -c robottelo.properties tests/foreman/cli/test_org.py:TestOrg.test_bugzilla_1076568_1 tests/foreman/cli/test_org.py:TestOrg.test_bugzilla_1076568_2 tests/foreman/cli/test_org.py:TestOrg.test_bugzilla_1076568_3 tests/foreman/cli/test_org.py:TestOrg.test_bugzilla_1061658
nose.config: INFO: Ignoring files matching ['^\\.', '^_', '^setup\\.py$']
@test: Delete organization by name ... ok
@test: Delete organization by ID ... ok
@test: Delete organization by label ... ok
@Test: Organization delete fails with 500 Server / Candlepin 404 error ... ok

Ran 4 tests in 106.166s

OK
$ nosetests -c robottelo.properties -m test_positive_delete_1 tests/foreman/cli/test_org.py
nose.config: INFO: Ignoring files matching ['^\\.', '^_', '^setup\\.py$']
@test: Create organization with valid values then delete it ... ok
@test: Create organization with valid values then delete it ... ok
@test: Create organization with valid values then delete it ... ok
@test: Create organization with valid values then delete it ... ok

Ran 4 tests in 106.037s

OK
$ nosetests -c robottelo.properties -m test_positive_delete_2 tests/foreman/cli/test_org.py
nose.config: INFO: Ignoring files matching ['^\\.', '^_', '^setup\\.py$']
@test: Create organization with valid values then delete it ... ok
@test: Create organization with valid values then delete it ... ok
@test: Create organization with valid values then delete it ... ok
@test: Create organization with valid values then delete it ... ok

Ran 4 tests in 111.509s

OK
$ nosetests -c robottelo.properties -m test_positive_delete_3 tests/foreman/cli/test_org.py
nose.config: INFO: Ignoring files matching ['^\\.', '^_', '^setup\\.py$']
@test: Create organization with valid values then delete it ... ok
@test: Create organization with valid values then delete it ... ok
@test: Create organization with valid values then delete it ... ok
@test: Create organization with valid values then delete it ... ok

Ran 4 tests in 111.231s

OK
```
Merge pull request #1112 from omaciel/re-enable-org-deletion-cli

Re-enabling Organization deletion tests via CLI.
Updated ActivationKey API v2 Tests.

Noticed that ``test_positive_create_3`` was failing because of some
apparent changes done to the POST method. Before, if I tried to create
an activationkey setting ``unlimited_content_hosts`` to ``True`` and
``max_content_hosts`` to a random value, valid or invalid, the
activationkey was created and ``max_content_hosts`` was ignored and set
to ``None`` (the test checked that the key was created and that
``max_content_hosts`` was ``None``).

Now it looks that if you try to do the same thing, you get a ``422``
error due to ``max_content_hosts`` being automatically set to ``Nil``.

```pycon
In[1] attrs =
entities.ActivationKey().create(
    fields={u'unlimited_content_hosts': True, u'max_content_hosts': -3})

FactoryError: Error encountered while POSTing to
https://qetello02.usersys.redhat.com/katello/api/v2/activation_keys.
Error received: {u'max_content_hosts': [u'cannot be nil']}
```

I have changed this test to be a negative test and updated the
assertions appropriately.
Merge pull request #1113 from omaciel/fix-activationkey-api-v2

Updated ActivationKey API v2 Tests.