CBQE-0: add more debug info to getting stats

Change-Id: I72dec5b3e1ba4b9a7f32f49e9472288347efbf8c
Reviewed-on: http://review.couchbase.org/32586
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>
Tested-by: Iryna Mironava <irynamironava@yandex.ru>
CBQE-1895: tuq: implement tests for key+array expr

Change-Id: I89cd2199d4a0e45eae495282d810269714b01d22
Reviewed-on: http://review.couchbase.org/32685
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>
Tested-by: Iryna Mironava <irynamironava@yandex.ru>
CBQE-0: Fix _get_indexer_task_pid

unable to check index on server 10.3.4.66 because of _get_indexer_task_pid() takes exactly 2 arguments (3 given)

Changed to right number of arguments

Change-Id: I2bb4b3a51be5750cfab9fe6da15e73ddd4afc07f
Reviewed-on: http://review.couchbase.org/32712
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>
Tested-by: Iryna Mironava <irynamironava@yandex.ru>
CBQE-1900: tuq: add test join+unnest+alias

Change-Id: If3c89edbabb0365e3dd067018ea72628470e6981
Reviewed-on: http://review.couchbase.org/32717
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>
Tested-by: Iryna Mironava <irynamironava@yandex.ru>
CBQE-1901: add tests for unnest expression

Change-Id: If80daed204fde97c8a4523a3438329fddef87152
Reviewed-on: http://review.couchbase.org/32718
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>
Tested-by: Iryna Mironava <irynamironava@yandex.ru>