This patch fixes failures in mtr (without --remote) in the following tests:
columnstore/basic.mcs88_import_export_csv
columnstore/basic.mcs47_cpimport_central_loc_sin_source
columnstore/basic.mcs49_cpimport_parallel_dist
columnstore/basic.mcs50_cpimport_stdin
columnstore/basic.mcs55_cpimport_binary_source
columnstore/basic.mcs56_cpimport_negative
columnstore/basic.mcs68_cpimport_datafile_separators
Also fixing the problem with missing UDFs for the affected tests.
(see MCOL-4659 for details):
When mtr runs without --remote, the UDFs must be installed inside
the test using CREATE FUNCTION.
Note, there are still more tests left with missing UDFs. They'll be
fixed separately.