fixes #14131 Changed bash to sh

Refs #12911 - Fixing colon method calls

Fixes 13401 - ssh_provision: safe stderr as well

The log file currently only gets stdout which leaves only guessing when
looking for provision errors.

fixes #13298 - ssh_provision: Don't use /tmp

On some systems (e.g. SLES12) /tmp is mounted noexec by default so not
usable to run the provision script. The home directory of the
connectiong user should be writeable by itself though so just use this
instead.

fixes #12632 - remove hardcoded SSH compression algorithm

net-ssh behaviour changed in 2.10 from treating a specified algorithm
as a preference (and falling back to one it knew) to treating it as a
whitelist of algorithms. OpenSSH servers need the algorithm...

Fixes #11987 - Check exit code of deployment scripts

This commit fixes checking exit codes returned from provisioning templates, which were ignored
because of sending results through pipe to command tee. Also adds optional host deleting if deployment
fails because of non zero exit code. This can be configured by setting clean_up_failed_deployment...

Fixes #10713 - improved backtrace logging

• full trace in 500 page in production shows really the full trace
• Foreman::Logging.exception as an unified entry point for exceptions logging
• the backtrace cleaner doesn't delete the plugins
• the orchestration exceptions gets the backtrace covered by logger...

fixes #8516 - removing the require 'fog' from the project, requiring only what we use

Refs #3809 - Remove cops for empty lines

Refs #3809 - Use parentheses in method definitions