Update to latest bootstrap script stable release v2014.08.30

* Skip service checks for `salt-api`, since this should be an opt-in service not necessarily meant to start at boot time.
* Distro Support Fixes:
  * Also install the salt-api service on RHEL based distributions for git based installations.
  * Properly detect Arch Linux when lsb-release is available
  * Updated the URL for EPEL 7
Merge pull request #15399 from s0undt3ch/hotfix/bootstrap-script

Update to latest bootstrap script stable release v2014.08.30