* Fix persistent command timeout handling
We were using play context timeout on ansible-connect to set
the persistent command timeout handler. Thus, we were ignoring
the persistent_command_timeout setting.
Moreover, even by changing that on ansible-connection, were again
overriding it on cliconf send_command, since in a same process we can
just set a single alarm and cliconf send_command alarm setup is executed
after ansible-connection alarm setup.
* Remove alarm setting on cliconf send_command
The alarm is set regardless before it is executed by ansible-connection.
Setting an alarm again, overrides/disables the previous ones as a single
process can just have a single alarm set.
* Move the setting of persistent command timeout to network_cli
We do also use ansible-connection for connection local, so if a
user provides a timeout via provider that would be ignored if we
set the value on ansible-connection.
Moving that logic to network_cli plugin constructor makes both
connections to work.
* Remove debug statements
* Set the persistent command timeout on task_executor
We can't set the timeout on ansible-connection nor network_cli,
otherwise tasks using provider timeout won't work.