LU-10973 lnet: LUTF dynamic discovery test suite

LU-10973 lnet: LUTF dynamic discovery test suite

Add the dynamic discovery test suite to the LUTF test cases.

Updated some of the infrastructure scripts with methods needed
for the DD test cases

Test-Parameters: @lnet
Signed-off-by: Amir Shehata <ashehata@whamcloud.com>
Change-Id: I0cfef4ae6f88b4deca12f1a3d5ef3291137a6c04
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/39195
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: jsimmons <jsimmons@infradead.org>
Reviewed-by: Serguei Smirnov <ssmirnov@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>