Fixes #8604

Fixed role name for
    - { role: 'lives/in/a/subdirectory' }
Should be 'lives/in/a/subdirectory', not just 'subdirectory'

`ansible-galaxy init --offline ...` can create a role without
talking to the galaxy api server
`ansible-galaxy install ...` only needs to talk to the galaxy api
server for galaxy roles, not tar files or scm archives
Fixed a bug in command line role installation

Older git archive commands create tar archives even with a tar.gz
extension. So change it to always create tar archives and have
the install_role method cope.

Removed ssh roles from the test case as they don't work unless
you can connect to bitbucket via ssh and have your key there.

Corrected a minor typo in error messages

Added docs
Added more tests
Improved how roles are returned from the parsers

* Roles can now be given a friendly name as third field in role spec csv
* Roles can be installed from URL (not just from archived SCMs)
* Integration tests to demonstrate this
* Unit tests to ensure that role spec parsing works as expected

Moved repo_url_to_role_name to common method in ansible.utils
Added unit test for repo_url_to_role_name
Added integration tests for galaxy

Ensure that if meta/main.yml has dependencies containing URLs
these are correctly resolved at playbook runtime.

Update role_name during run time so that output of e.g. task names
look sensible

Change SCM determination from executing git/hg commands to explicit
in URL.

Fix check for already installed dependencies

ansible-galaxy can now refer to SCM URLs (git and hg at this point)
for role names
Dependencies need to use the full SCM URLs too.
Otherwise all seems to work well

Test rolesfile
```
http://bitbucket.org/willthames/git-ansible-galaxy,v1.1
https://bitbucket.org/willthames/hg-ansible-galaxy
```
(works with ssh too)

When trying to create a directory relative to the current working
directory, a directory is created at the root of the filesystem
instead.  This patch ensures that directories specified with relative
paths will be created in the current working directory.  Fully
qualified paths aren't affected

Signed-off-by: Major Hayden <major@mhtx.net>

Merge branch 'role_path_var' of https://github.com/sergevanginderachter/ansible into sergevanginderachter-role_path_var

Conflicts:
	test/integration/roles/test_copy/tasks/main.yml

Fixes #8638

Fixes #8698