Update Umbrella Roaming Client.xml

Added prompts for the following parameters:
ORG_ID, ORG_FINGERPRINT, USER_ID, HIDE_ARP, HIDE_UI

All variables are checked to confirm that they are not blank and then procedure checks for existence of Umbrella_RC service. If services does not exist, installer is downloaded and executed using parameters defined in prompt.

Notes in script help with parameter definition.