build: Enable MLK check for connectivity tests
build: Enable MLK check for connectivity tests

Bug: https://jira.iotivity.org/browse/IOT-1428
Change-Id: I91620205843da3c68d600deffe44e55001ff8f51
Signed-off-by: Philippe Coval <ff46fec9739d31cce915aabcc3a7a2c00eee4d6c@osg.samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/15383
Tested-by: jenkins-iotivity <09cb29e8a2b473a2c978382eec13ee06fa017bda@opendaylight.org>
Reviewed-by: Habib Virji <40be98b50fb6c4d79bd282a617e2cc82e300d47f@samsung.com>
Reviewed-by: Mats Wichmann <7a5e6f27299d2bbd9d04b59d9e8e4f8eab83d8cb@linux.com>
Reviewed-by: Kevin Kane <cd40c34e976f30c9e62efcf24e04c516bc3a3b05@microsoft.com>

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