Fix for fatal errors on Mac to do with loading of Pcp.php file when it gets confused about casing. Unlikely to affect live sites as does not fail on jenkins
When I run the SyntaxConformance tests locally I get a fatal error because it tries
to include api_v3_pcp.php after having included api_v3_PCP.php & thinks they are 2 files.
This is a Mac so obviously the handling is different to the jenkins method. Not overwriting the
param if passed in works locally