ConfigFileSystemHandlerTest fails on Windows

Bug description

The ConfigFileSystemHandlerTest unit test fails on Windows when it's testing the replacement of the am.data.dir variable using the commons placeholder approach.
This looks to happen because windows paths are using backslashes as opposed to forward slashes.
This is likely a product bug.
Example failure:

java.lang.AssertionError: 
Expecting:
  <{"placeholder-port-string"="C:UsersaldarisAppDataLocalTemp1570399030845", "test"="value"}>
to contain value:
  <"C:\Users\aldaris\AppData\Local\Temp\1570399030845">

	at org.forgerock.openam.sm.file.ConfigFileSystemHandlerTest.<cuppa test>(ConfigFileSystemHandlerTest.java:233)

How to reproduce the issue

Run the unit test on Windows

Expected behaviour

It passes

Current behaviour

It fails.