Need to add execution of MOS integration tests to SWARM test suite

We have a lot of integration tests for MOS verification in upstream and in separate repository https://github.com/Mirantis/mos-integration-tests. We are going to move all our tests to one jenkins with SWARM tests and this is why we need to add system tests which will execute all tests from repository https://github.com/Mirantis/mos-integration-tests to SWARM test suite.

These tests will be executed on the separate environment as well as Tempest tests or integration tests for Sahara and Murano deployments validation.

We need to add SWARM tests which will export all required variables and will run run_tests.sh script from https://github.com/Mirantis/mos-integration-tests.