Removed “P_001” prefix from test classes

I think I missed something here earlier; every test isn't supposed to be prefixed with “P_001”, just the sole target-specific test (and maybe future target-specific stuff).  Now these tests are just the correlating class's name with a “Tests” suffix.

Also updated project file.

Affected:
• InchCoordProxyTests.h/.m
• InchLocationTests.h/.m
• P001ModelTests.h/.m
• P001ModelTestsModel.inc
• P_001P001ModelTestsModelWithoutDealloc.inc