Corrected issue with creation of play local changes from source command
in new instance factory: 
- creationPart was used instead of pcsCreationPart.

Corrected issues in play local changes from source command:
- In playThenReverseChanges, changes to push/play weren't forwarded
according to the root distance.
- In mapToReferenceLocation, the root distance were supplied as an
argument for the new play local changes from source command to create.

Signed-off-by: Jakob Brandsborg Ehmsen <jakobehmsen.github@gmail.com>