added diskuasge() - calculates diskusage of a directory
diskusage() - added a way to check files
fixed pylint violations
Added boto_cfn.py for beginning of Cloud Formation module

This is the very beginning of the Cloud Formation module, but it has been tested
and currently has the capability to create, delete, get_template, and test to
see if a Cloud Formation stack exists.  There are many more parts to be added,
but this will allow for Salt to create stacks.  As with all boto modules, this
can use credentials in the minion, pillar, or AWS IAM roles.  Not all methods
were tested, but it uses the same methods as other modules, and in fact was
created by just copying the SQS module and replacing most parts.
allow for git HTTP Basic Auth when using https://

- Overview

This commit adds support for HTTP Basic Auth user and passwords when cloning
a git repository. Restrictions are placed to ensure Basic Auth is only used
when accessing remote repositories over HTTPS.

Support for updating remotes is included for user/password/uri changes.

Submodule support is not maintained, as those are outside the scope of my
initial need :)

This has a terrific tendency to leak credentials in the clear due to logging
in the cmd.run set of tools.

- Motivation

Specifically, GitHub's HTTPS access layer has some niceties not available when
using the SSH protocol. See https://help.github.com/articles/which-remote-url-should-i-use/#cloning-with-https-recommended

It is nice to enforce read-only access to repositories from remote hosts.

Also, it is a lot cleaner to drop Passwords/Security Tokens in configurations
rather than PEM form private keys.
lint fixups
fix test_valid_docs failures

04:47:36 ======================================================================
04:47:36 ERROR [0.371s]: test_valid_docs (integration.modules.sysmod.SysModuleTest)
04:47:36 ----------------------------------------------------------------------
04:47:36 Traceback (most recent call last):
04:47:36   File "/testing/tests/integration/modules/sysmod.py", line 85, in test_valid_docs
04:47:36     '\n'.join(['  - {0}'.format(f) for f in sorted(noexample)]),
04:47:36 AssertionError: There are some functions which do not have a docstring or do not have an example:
04:47:36 No docstring:
04:47:36
04:47:36 No example:
04:47:36   - git.urlparse
04:47:36   - git.urlunparse
04:47:36
04:47:36
04:47:36 ----------------------------------------------------------------------
04:47:36 Ran 208 tests in 511.923s
04:47:36
04:47:36 FAILED (errors=1, skipped=34)
Bugfix git_pillar (__env__ related)

Fixes bug that shows up when caches are cleared.
Use dict.get in stead of __getitem__ to catch missing values
in opts.
Fixes #18587, this considers nofail as a invisible mount option. This should fix mounts that always remount every run.
Key name was changed in version 2 of the digital ocean API
Merge pull request #18589 from dmyerscough/fix-digital-ocean-delete

Key name was changed in version 2 of the digital ocean API
Allow volumes to be tagged upon creation
Merge pull request #18507 from theksk/file-diskusage

File diskusage
Fix CLI examples in pagerduty
Add runner for PagerDuty
Update docs to reflect runner status
Merge branch 'cloud-formation' of https://github.com/freimer/salt into freimer-cloud-formation
lint, remove unused imports
Merge pull request #18560 from ewdurbin/git_https_basic_auth

allow for git HTTP Basic Auth when using https://
Merge pull request #18574 from keesbos/bugfix-__env__

Bugfix git_pillar (__env__ related)