Updated the error messages for Resource Manager reported Container Failure
This closes #767: The exception sent to the user code when the resource manager reports a failed or closed Container are now more legible and give a clearer explanation of what actually happened.
Merge pull request #787 from Microsoft-CISL/weimer_767

Updated the error messages for Resource Manager reported Container Failure
Merge branch 'master' of github.com:Microsoft-CISL/REEF into sergiym_fix_pom