New property: testsuite.maxAllowedRuntime

[simonmeggle]

Let Sakuli terminate a running test after a certain amount of time, e.g. 300 Seconds:

testsuite.maxAllowedRuntime=300

Validate that this threshold is higher than the critical suite threshold.
Proposal for return value:

UNKNOWN: Sakuli suite 'foobar' exceeded maxAllowedRuntime (300s) and was terminated.

[simonmeggle]

Introduce new Sakuli Suite state:

7 - ABORTED

and map this state to the Nagios state 3 (UNKNOWN)

[simonmeggle]

If maxAllowedRuntime is lower than ciritcial suite threshold, return

UNKNOWN: maxAllowedRuntime must be higher than Suite runtime.

[toschneck]

maybe default value of 1 houre