Restructure bootstrapRHELserver like Ubuntu

Copy/Paste bootstrapUbuntuServer.sh and change as appropriate to
yum/RHEL conventions.
Add VistA init script and modify importVistA to work

importVistA:
* Didn't exit when it determined there isn't certain environment
variables weren't set
* Routines didn't import correctly. Restructured command to be easier to
read and fix the bug

vista init script
* sketelon structure
* pseudocode for sections that don't exist yet
* Start/Stop TaskMan
* Kills dangling processes when stopping in 2 ways
* Many TODOs left