PermissionsIT - implement test cases with sasl enabled

[DomGarguilo]

Is your feature request related to a problem? Please describe.
This ticket replaces TODOs in PermissionsIT:

accumulo/test/src/main/java/org/apache/accumulo/test/functional/PermissionsIT.java

Lines 420 to 424 in 04ac8b2

	case OBTAIN_DELEGATION_TOKEN:
	if (saslEnabled()) {
	// TODO Try to obtain a delegation token without the permission
	}
	break;

and

accumulo/test/src/main/java/org/apache/accumulo/test/functional/PermissionsIT.java

Lines 593 to 597 in 04ac8b2

	case OBTAIN_DELEGATION_TOKEN:
	if (saslEnabled()) {
	// TODO Try to obtain a delegation token with the permission
	}
	break;

Which requests that the test cases, where delegation tokens are attempted to be obtained with sasl enabled, are implemented.

Describe the solution you'd like
Enable sasl for this IT and attempt to obtain a delegation token with and without the needed permissions.

Additional context
These cases where investigated in #3001 and the comments were changed to remove the TODO.