CallsMonitoring teardown rules

[dmitry-sinina]

Currently CallsMonitoring terminating calls in case of disabled/deleted customer auth, origination gw, termination gw. We have to allow flexible configuration for this.

1. add configuration attributes in yeti_web.yml like teardown_on_disabled_customer_auth: false, teardown_on_disabled_term_gw: false
2. Current behavior should be default when no configs present