Change long timeout to select() from poll()
Change long timeout to select() from poll()

Change from poll() to select() for the potentially long wait in ipmi
event loop.  This is to facilitate interop with being monkey patched
with eventlet, as eventlet does not currently monkey patch poll(), but
does monkey patch select()

Change-Id: I8d6f42193ee82e2c5de7ad112232c2c77ef78825

stackforge/pyghmi,openstack/pyghmi,benoit-canet/pyghmi,openstack/pyghmi