LU-16804 tests: rename 'complete' to 'complete_test'

LU-16804 tests: rename 'complete' to 'complete_test'

The test-framework.sh "complete" function conflicts with "complete"
exported from bash_completion, and this causes lustre-initialization
to fail in some configurations now that the lustre test config
is loaded earlier during test-framework.sh init_test_env() setup.

Rename "complete" to "complete_test" to avoid this conflict.

Lustre-change: https://review.whamcloud.com/51383
Lustre-commit: TBD (from 9bf8d1944995e7bf627a602aa1d0523d810c84b6)

Test-Parameters: trivial
Fixes: fdbb2bc849 ("LU-16804 tests: load CONFIG at beginning of init_test_env")
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: Ic72d8d5cc4a65feec6bfb2a76ac5f9b9d78e3f75
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/51389
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Charlie Olmstead <charlie@whamcloud.com>