Fix relative class path arg handling in runtest, and some lint errors.

testrunner/test_defs/abstract_test.py

@@ -23,7 +23,6 @@ import xml.parsers
 
 # local imports
 import errors
-import logger
 
 
 class AbstractTestSuite(object):
@@ -32,6 +31,9 @@ class AbstractTestSuite(object):
   This class will parse the XML attributes common to all TestSuite's.
   """
 
+  # name of xml tag a test suite handles. subclasses must define this.
+  TAG_NAME = "unspecified"
+
   _NAME_ATTR = "name"
   _BUILD_ATTR = "build_path"
   _CONTINUOUS_ATTR = "continuous"