Embodiment's schema timeout exceeded by some combo functions

[Welter]

[bug transferred from Petaverse's bugzilla: http://extranet.vettalabs.com:8088/petaverse/bugs/show_bug.cgi?id=120]

------- Original bug description -------

While doing system tests with current petaverse code (revision 1262 and previous) both moveObjectToPlay and chasePetHoldingSomething has exceeded 90 seconds and, therefore, a timeout error happened. We should either increase the schema execution timeout (which may have bad side effects, if not done adaptively) or break the mentioned schemata into rules to
be selected consecutively when the precondition is satisfied.

Anyway, I marked this as a minor bug, since the cancellation of these schemata is not necessarily a problem (the pet will just stop executing a behavior after reaching a time limit -- and it may re-select this same behavior next if the rule where it came from is activated again if the pre-conditions remains)