Fixing WD with New Tests

[brodieG]

Two issues here related to state:

> unitize('inst/expkg/rcw/rcw-test.R', state(working.dir=0))

Error in checkSlotAssignment(object, name, value) : 
  assignment of an object of class “numeric” is not valid for slot ‘working.directory’ in an object of class “unitizerStateRecommended”; is(value, "integer") is not TRUE
> unitize('inst/expkg/rcw/rcw-test.R', state(working.dir=0L))

Error in as.character.default(x) :                                              
  no method for coercing this S4 class to a vector
| 
| The following unitizer could not be loaded:
| - unitizer for test file '../inst/expkg/rcw/rcw-test.R': `get_unitizer` error:
|   No method defined for object of class "unitizerStateRecommended"

| No valid unitizer to load

No tests to review

In first case should allow numeric values for state, in second not sure what's going on.