async Runner executions can be killed prematurely by agent (missing timeout)

[simonmeggle]

The V2 bakery script does not set the timeout for async plugin execution.
As a consequence, a default timeout of "check_interval (1min) + X" is used.
For most e2e web tests this is sufficient, but longer tests will be killed by the agent.
See
https://host/site/check_mk/plugin-api/cmk.base.cee.plugins.bakery.bakery_api/v1.html#cmk.base.cee.plugins.bakery.bakery_api.v1.Plugin

[simonmeggle]

In V1 , timeout is set to the same value as cache_time (=execution interval).
This should be changed to 5sec less than execution interval in V1 and V2.