Tests several ways to specify the repository.  For every repo added, the test
asserts that:

 * the apt-cache was updated as expected (depends on `update_cache` parameter)
 * the PPA key was installed (depends on `repo` format)

To support parallel cloud test execution, create and provide a random string to
cloud integration tests.  The variable 'resource_prefix' can be used in cloud
roles and during resource cleanup to safely create/destroy cloud-based
resources.

Additional changes include:

 * The roles test_ec2_key and test_ec2_group were updated to use to
 {{resource_prefix}}.

 * Additionally, the Makefile was updated to set resource_prefix to a random
 string.  The Makefile will also use 'resource_prefix' during cloud_cleanup.

 * All test_ec2* roles were updated to add 'setup_ec2' as a role dependency.

Testers may override the inventory and vars-file using the environment
variables 'INVENTORY' and 'VARS_FILE'.

Includes coverage for accept_hostkey and additional scm URL formats.

This prevents a traceback when the group is empty.
Fixes #6258

s/seperate/separate/

http://en.wiktionary.org/wiki/separate

Closes GH-5354.

Forklift copy logic into unarchive. Provides integration unit tests.

The 'service' utility was unable to find the 'ansible_test' service due to an
unexpected filename.  This patch corrects the filename and adjusts the
permissions to match other service scripts within /etc/init/.

Redhat != RedHat

This fixes integration tests when run on a RHEL system.  Oddly, the
ansible_distribution='RedHat' when run on RHEL.

Post merging of GH-5837 via GH-5749.

closes #5749

Conflicts:
	test/units/TestInventory.py

tests issue #5749
 same host defined in different groups which in turn are defined
 in different ini files in an inventory directory

Conflicts:
	test/units/TestInventory.py

0. Uncomment the test.
1. Test fails.
2. Make vars unique per file in test inventory files.
3. Modify token addition to not ast.literal_eval(v) a variable containing a hash.
4. Modify vars to have an escape in test inventory file.
5. Catch exceptions explicitly. Any unknown exceptions should be a bug.
6. Test passes.

This reverts commit a8082874, reversing
changes made to 6129ea75.

closes #5749

Conflicts:
	test/units/TestInventory.py

tests issue #5749
 same host defined in different groups which in turn are defined
 in different ini files in an inventory directory

Conflicts:
	test/units/TestInventory.py

It came up that fixing this unit test may relate to another ticket that is open. This work allows us to uncomment this unit test by fixing how we pars variables allowing a quoted variable to contain a '#'.

Work also went into cleaning up some of the test data to clarify what was working.

Lastly work went into cleaning up formatting so that the code is easily read.

This prevents a traceback when the group is empty.
Fixes #6258

Remove the legacy templating code, which was guarded by deprecation warnings in the previous two releases, and undocumented for a long time.  use {{ foo }} to access variables instead of ${foo} or $foo.

Some systems that we are testing on may not have /etc/motd. So we need to create a file that we can control and use that for the further tests.