These used to go in vars_cache, so merging them in after that as they
are "live" variables and the user would most likely want to see these
above anything else.

Fixes #12327

Python 3: make ansible.template.safe_eval() work

Test for Python must be against basename of interpreter

This reverts commit 926f1272.

Followup on issue #12076

Add the new module replacer <<INCLUDE_ANSIBLE_MODULE_JSON_ARGS>>.

There was code to support set literals (on Python 2.7 and newer), but it
was buggy: SAFE_NODES.union() doesn't modify SAFE_NODES in place,
instead it returns a new set object that is then silently discarded.

I added a unit test and fixed the code.  I also changed the version
check to use sys.version_tuple instead of a string comparison, for
consistency with the subsequent Python 3.4 version check that I added in
the previous commit.

Two things changed in Python 3.4:

- 'basestring' is no longer defined, so use six.string_types

- True/False are now special AST node types (NamedConstant) rather than
  just names

(Good thing we had tests, or I wouldn't have noticed the 2nd thing!)

I found only one place where safe_eval() is called inside the ansible
codebase: in lib/template/__init__.py.  The call to safe_eval(result,
...) is protected by result.startswith('...'), which means result cannot
possibly be a byte string on Python 3 (or startswith() would raise, so
six.string_types (which excludes byte strings on Python 3) is fine here.

Fixes #12314

cloudstack: new integration test role test_cs_user

Fixes #12313

Required as part of fix for #12123

Fixes #12123

Rename ansible_ssh_{host,port,user} in docs to ansible_*

The _ssh variants will continue to work, but the shorter, more generic
names are preferred now.

Doc fixes

Resurrection of the comment filter

Python 3: use the right PyYAML SafeRepresenter for unicode

PyYAML has a SafeRepresenter in lib/... that defines

    def represent_unicode(self, data):
        return self.represent_scalar(u'tag:yaml.org,2002:str', data)

and a different SafeRepresenter in lib3/... that defines

    def represent_str(self, data):
        return self.represent_scalar('tag:yaml.org,2002:str', data)

so the right thing to do on Python 3 is to use represent_str.

(AnsibleUnicode is a subclass of six.text_type, i.e. 'str' on Python 3.)

change ec2 util to create only requested objects

Fixes #12282

Typo in comment: "bsaename" → "basename"

Vault missing DataLoader for pwd file #12293

Fixes #12301

Allows ANSIBLE_LIBRARY to overload core modules even if the module in
ANSIBLE_LIBRARY doesn't have a .py extension.

Fixes #12284

Fix problem with "=" in the initial file path.