Merge pull request #7814 from scottbrown/bugfix-7811-mysql_import_does_not_perform_dump_existence_check

BUGFIX for Issue 7811: Adding file existence check when performing mysql import on...

Set default vg_options to empty string

Updates django_manage so it populates VIRTUAL_ENV

BUGFIX 1178: Adding better existence check in one place.  db_import now fails fast if target does not exist b/c no point going further without the target.

Building Ansible deb requires setuptools

BUGFIX 7811: Adding file existence check when performing mysql import on a .gz or .bz2 file, otherwise Ansible will not notice that the underlying *nix command silently died.

Fixes password lookup docs

Allow gem executable to contain spaces

Virtualenv's activate script sets the VIRTUAL_ENV environment variable to the path of the virtualenv. Checking this variable is a reasonably common way to verify that execution is happening in a virtualenv. It would be convenient if this module's virtualenv handling set this environment variable.

Allow npm executable to contain spaces

rbenv has a special exec function which loads the correct ruby version before executing a command.
The syntax for this is `/usr/local/rbenv/bin/rbenv exec gem ...` for example.
But previously when specifying executable='/usr/local/rbenv/bin/rbenv exec gem' this would not work because the string was treated as one executable. This PR fixes that by splitting the executable on spaces.

NVM has a special script which loads the correct node version before executing a command.
The syntax for this is `/usr/local/nvm/nvm-exec ...`, so `nvm-exec npm list --json` for example.
But previously when specifying `executable='/usr/local/nvm/nvm-exec nvm'` this would not work because the string was treated as one executable.

Update tower.rst

Added missing fallback to hw_sector_size

Point to current URLs, fix a Ansible/Tower reference.

module rax_scaling_group: safe normalization of nics

[openbsd-pkg] Add note regarding package flavors

Fix in pkgutil: don't call pipes.quote() on None

unarchive: improve failure detection and reporting

Prevents a "not a legal parameter" error for play ds structures that
may be passed into the Play() constructor, which really is mainly a
concern during tests.

fix for repo urls like ssh://git@github.com/ansible/ansible.git

Fix task description

Removed duplicate entries (1.6.1-1.6.3) in changelog.

Related to #7777

In this function, 'site' may be None, which will cause an exception
if it is passed to pipes.quote().

This adds a note to the openbsd-pkg module which explains how to specify
package flavors as well as how to avoid ambiguity errors on a package
with multiple flavors.

Technically, this is not Ansible-specific, but it's pretty likely the
user will encounter this problem.

Added missing fallback from physical_block_size to hw_sector_size in sectorsize fact discovery for kernels older than May 2009.

References #5761

Previously, the get_fqdn() function in known_hosts.py only worked
with urls that started with git@, and ignored any urls that started
with a normal schema type (ie. http:// or ssh://). This patch corrects
that by using urlparse to parse the hostname portion out of urls that
have a proper schema.

Fixes #7474