It was a regression caused by changing the order of imports that
affected most Python plugin users due to Jython specific resolve logic
applied to CPython interpreters.

overload resolution: same signatures should not check return types, etc already processed in hierarchical signatures (IDEA-172129)

just delegate to ProgressIndicatorUtils
allows to use it from read action, and to pass a progress indicator

Convention is the following:
 * package is called "newTestRunners" because "testing.tests" sounds silly. I will move classes one level above when we remove old runners.
 * Abstract and shared (used by several runners) classes got appropriate names
 * Runners are called PyNose, PyUnit, PyPyTest

remove isWritable from BaseDocumentAdapter

display to the user when debugger evaluation fails during indexing (EA-100744 - INRE: FileBasedIndexImpl.handleDumbMode)

to decrease the number of Swing events produced
to eliminate "too many events" from LaterInvocator redispatches
to make TransferToEDTQueue not so necessary

JavaStackFrame.shouldSkipLine:=false if index fails (EA-100750 - INRE: FileBasedIndexImpl.handleDumbMode)