1. Added AugustaOrGreater method to Helpers class (which is preferred method over MethodExists to check if a xapi call is available on a server). Also removed MethodExists method.
2. Utilized AugustaOrGreater method in GetDRMissingSRs method in both VM and VM_appliance classes.
1. Modified RunCheck method in AssertCanBeRecoveredCheck.cs to always take
into account SR passed in ErrorDescription.
2. Format Description in MissingMultipleFCSRsProblem.cs.
Signed-off-by: Adrian Jachacy <Adrian.Jachacy@citrix.com>