config to control the behavior of the CallsMonitoring job

[Ivanov-Anton]

Description

add config to control the behavior of the CallsMonitoring job

introduces new configuration options in yeti_web.yml to control the behavior of the CallsMonitoring job when dealing with disabled customer authentication and both origination/termination gateways:

- calls_monitoring.teardown_on_disabled_customer_auth
- calls_monitoring.teardown_on_disabled_term_gw
- calls_monitoring.teardown_on_disabled_orig_gw

The CallsMonitoring class has been updated to use these configurations in the relevant methods. If the configs are not present, the current flow should not be changed.

Additional links

closes #1526

[Ivanov-Anton]

@dmitry-sinina this PR is ready to code review

[Ivanov-Anton]

@dmitry-sinina this PR is ready to code review

[Ivanov-Anton]

@senid231 just appliyed your last suggestion.

[dmitry-sinina]

new config variables should be described there:

https://github.com/yeti-switch/yeti-web/blob/master/config/initializers/_config.rb#L25

[Ivanov-Anton]

just appliyed your last suggestion