TRQ-3010 Many large leaks around Torque server with cray

This regression is on pbs_mom. gen_macaddr makes a call to
pbs_getaddrinfo which tries to save the address in a addrcache
instance. But the instance does not exist and when the destructor
is called the child process segfaults. This was changed
to call getaddrinfo directly.
Merge branch 'develop' of https://github.com/adaptivecomputing/torque into develop