Remove unused code from get_ca_certs() function
module.run_command is intended to bypass the shell here, so can't do ">>"
Adding validate_certs to all modules that use fetch_url
Remove validate_certs parameter from fetch_url calls
Don't append tags from roles to the plays tags list

Fixes #6393
Don't process shell commands as arrays.
setup module: Mark unsafe commands as use_unsafe_shell=True.
Merge pull request #6444 from risaacson/setup_unsafe_shell

setup module: Mark unsafe commands as use_unsafe_shell=True.
Fix #5679 again after recent changes in core
git: Execute git commands in `dest` directory
Use same implementation as ssh.py for "is in host file" checks in module code, prevents git module from adding keys more than once.
Compile ca certs into a temp file to reduce number of attempts

For those who may have a large number of certs found, this can reduce
the number of ssl connections attempted.
Work around for cwd stat problems with run_command and sudo

This fixes issue #6443
Add notes about module.run_command to coding guidelines.
Merge pull request #6446 from patricksmith/fix-git

git: Execute git commands in `dest` directory
Merge branch 'patch-1' of https://github.com/dmkoch/ansible into dmkoch-patch-1
Make sure the cwd exists in run_command before trying to use it
Additional test_git scenarios

Includes coverage for accept_hostkey and additional scm URL formats.
Add credentials.template and support custom INVENTORY

Testers may override the inventory and vars-file using the environment
variables 'INVENTORY' and 'VARS_FILE'.
Various commits to enable no-shell or safe-shell usage, more to come.