LU-11673 tests: add space before ']' in test-framework

LU-11673 tests: add space before ']' in test-framework

The test command '[' expects spaces before all arguments
including the closing ']'.

Add a space before the closing ']' in the function
print_summary() in test-framework.sh.

Lustre-change: https://review.whamcloud.com/35079
Lustre-commit: 54e011a729fd656ae8568192763afe12425cd05e

Signed-off-by: James Nunez <jnunez@whamcloud.com>
Change-Id: If2365cb5f2b9c003949c6224997644c61341fe35
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Wei Liu <sarah@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/36926
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>