Update test data for teca_blocking_event_create_overlap_table
Test files for teca_blocking_event_tracker and teca_blocking_event_relabel
Updated incorrect test data
Use binary mask instead of id for blocking event DetectBlob test
Added test data for blocking event detection.
Added/updated test data for groups/ensembles
add test data for detect_nodes
Added test files for variables in groups
revert r158. note: this will be needed for the threaded tc detector
re-baseline event filter tests
