InstallScripts: Update documentation for latest VBox/Vagrant
InstallScripts: Update documentation for latest VBox/Vagrant

The virtualbox guest additions have to be updated if people use the
latest VirtualBox and Vagrant together. Update the documentation to
include a workaround that is tested.

Change-Id: Ifef3286cd254432732f0c7477db9b1dc69b5a67b

mdgeek/VistA-FHIR-CWF,OSEHRA/VistA,shabiel/VistA,OSEHRA/VistA,mdgeek/VistA-FHIR-CWF,OSEHRA-Sandbox/VistA,timmvt/VistA_tt,OSEHRA-Sandbox/VistA,apexdatasolutions/VistA,timmvt/VistA_tt,OSEHRA-Sandbox/VistA,apexdatasolutions/VistA,shabiel/VistA,josephsnyder/VistA,OSEHRA/VistA,josephsnyder/VistA,OSEHRA/VistA,josephsnyder/VistA,timmvt/VistA_tt,timmvt/VistA_tt,mdgeek/VistA-FHIR-CWF,OSEHRA-Sandbox/VistA,OSEHRA-Sandbox/VistA,mdgeek/VistA-FHIR-CWF,OSEHRA/VistA,josephsnyder/VistA,mdgeek/VistA-FHIR-CWF,apexdatasolutions/VistA,josephsnyder/VistA,josephsnyder/VistA,shabiel/VistA,OSEHRA-Sandbox/VistA,shabiel/VistA,mdgeek/VistA-FHIR-CWF,shabiel/VistA,OSEHRA/VistA,shabiel/VistA,apexdatasolutions/VistA,apexdatasolutions/VistA,timmvt/VistA_tt