[apt_repository] Correct check_mode conditional logic

This reverts commit 4273cb2d.

This allows the use of an args list with leading environment variables,
which otherwise would fail due to the way Popen works.

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.

Also:
* changed this module to use https for requests to the API
* fixed a bug in which a traceback was caused when the domain wasn't found

Fixes #6457

Modules make run command safer

Fixes odd encoding problem with wait_for_service.

Conflicts:

	library/system/debconf

Conflicts:

	library/packaging/cpanm

This fixes issue #6443

For those who may have a large number of certs found, this can reduce
the number of ssl connections attempted.

Previously, the function checked only for a single CA root cert, however
some distributions may have multiple certs in a directory. This will now
try any .crt or .pem file contained within several common paths for
each platform.

Fixes #6412

Use same implementation as ssh.py for "is in host file" checks in module code, prevents git module from adding keys more than once.