fix postgresl-fts indexer: get_indexer reported not implemented When I implemented postgresql fts indexing I forgot to remove code that raised NotImplemented when it was requested. Also had to fix import to match filename. Added tests for native-fts paths in get_indexer.

try:
    # Python 3+
    from ssl import SSLError
except (ImportError, AttributeError):
    # Python 2.5-2.7
    from socket import sslerror as SSLError