parsoid-php-parsertests fetch mw/core faster

The job was doing a full clone of mediawiki/core when it really only
needed the tip of the master branch.  Convert to use the get-mw-core
macro to fetch master in the workspace, adjusted the way the
parserTests.php script is called.

Change-Id: I4422f162d93f8bd27984d3542b3d05824b0b7fee
parsoid-php-parsertests wrappers (times + colors)

Make the parsoid-php-parsertests a bit nicer by using timestamps in
console output and provide ansi color converstion in console.

Change-Id: Ice1f81995a6f47abd1af642eb6760bc8a68cd9fe