Let all UNISH variables be read from the environment or in the XML file. Switch to UNISH_TMP like the master branch even tho we are not using downlaod cache yet in 4.x

Changed some expected output on the tests to match what's in drush4. Not sure how we didn't catch this before.

Moshe Weitzman authored May 10, 2011 and Mark Sonnabaum committed May 21, 2011

#1151464 by moshe weitzman. Move define() from top of drush_testcase() to bottom so we can use is_windows() method there. Also change some Drush_TestCase:: to self:: for readability.

Moshe Weitzman authored May 20, 2011 and Mark Sonnabaum committed May 21, 2011

Speed up fieldTest by using the testing install profile instead of standard. Do so by creating field on user entity, instead of node+article.