refactoring: tests: fix php tests for headless scintilla; use assertEquals (r=ericp)
http://bugs.activestate.com/show_bug.cgi?id=99946

This causes the checkStructurePHP_textOnLeft to fail, because it's not
throwing an expected exception.

(integrated from komodo (trunk) change 81192 by marky)

git-svn-id: http://svn.openkomodo.com/repos/openkomodo/trunk@13349 b87d16e7-d29f-4ee1-b5ec-817d645d335f