fix typo breaking downloading files specified as URLs (used in WIEN2k, WPS)
fix default source path set by EnhancedTestCase.setUp
add thorough unit test for EasyBlock.obtain_file method
fix broken test
make sure sourcepath set in EnhancedTestCase.setUp uses absolute path
make sure sourcepath is set to an absolute path in test_exts_list easyconfig.py unit test
make sure we're back in the original directory after running main()
Merge pull request #903 from boegel/fix_bugs

fix typo breaking downloading files specified as URLs (used in WIEN2k, WPS)