Proposed Script Changes

Merge request to indicate the proposed changes to the scripts in a checklist fashion:

• remove extraneous functions from all scripts
• divide tango install scripts into multiple sub-functions
• change variables to look at our repo
• have Tango setup script move Tango setup directory (generated at root) to Tango user, like Autolab setup does
• have the Tango install get machine IP instead of hostname for docker instances (allows it to work as-is on regular Vone instances)
• have the Tango install set up ssh on the Tango user if it isn't already (this is in the scripts, but broken)
• add additional input parameters (tango repo and branch to point to, possibly others)
• make vmms images auto-compile in the Tango scripts as opposed to

Current install scripts (issue1 branch) successfully install and reinstall both Autolab and Tango.