Few timeout fixes related to UI

Increase the timeout value to avoid timing issues.

Used `wait_until_element` as the element takes time to appear.
Added CLI tests for Docker images.

Added two new CLI tests for creating repositories that use Docker
content. Please see #1550 and #1551 for more information about naming
conventions for Docker repositories. Please note that the existing
synchronization tests are affected by [Bugzilla #1152237](https://bugzilla.redhat.com/show_bug.cgi?id=1152237).

Also removed several Bugzilla decorators as the referred issues had
already been verified and tests were being run.

Finally, updated ``test_positive_update_1`` test as it was trying to
update ``FAKE_1_YUM_REPO`` to ``FAKE_1_YUM_REPO`` and assert that the
URL had been updated :)

All tests pass against nightly build (with some skips due to Bugzilla.)
Merge pull request #1558 from omaciel/docker-cli

Added CLI tests for Docker images.
Merge pull request #1562 from kbidarkar/fix-timings-issues

Few timeout fixes related to UI
Drop the * operator from a function call

The `*` operator is a useful tool, but it's also fairly mysterious. Use
`chain.from_iterable` instead.
Added an info blurb linking to new docs

The location of the addition is to keep greater emphasis on the
most important goal of this document.
Links in this document now work properly with sphinx.
Merge pull request #1566 from Ichimonji10/drop-star

Drop the * operator from a function call
Merge pull request #1542 from JacobCallahan/documenting

Added an info blurb linking to new docs
Make the readme a real file, not a symlink

The readme should render correctly when processed by rst2html, displayed on
GitHub, or read as a standalone file. In contrast, the main body of
documentation must be compiled before being read. Split the readme and main body
of documentation apart.

Add a table of contents to `docs/index.rst`.

Fix a random error in `robottelo/orm.py`.
Merge pull request #1568 from Ichimonji10/readme

Make the readme a real file, not a symlink
Fixing the links in supporting documentation

This update will allow the documentation links to work correctly
in sphinx-based documentation.
Note: This will break the links in GitHub.
Merge pull request #1567 from JacobCallahan/fix-doc-links

Fixing the links in supporting documentation
Update CLI make_repository factory

Add checksum-type option and update its docstring

Closes #1569
Merge pull request #1572 from elyezer/update-repository-cli-factory

Update CLI make_repository factory
increased the timeout value when selecting a repo from reposet
Merge pull request #1561 from sghai/fix-test

fix for end_to_end_ui smoke test