Bug 1137278 - Defer import of thclient until vendor/ is in sys.path
Bug 1137278 - Defer import of thclient until vendor/ is in sys.path

The treeherder client is in the vendor directory, however that doesn't
get added to the sys.path until settings/base.py is loaded, so defer the
import until we need it.

glenn124f/treeherder,wlach/treeherder,sylvestre/treeherder,sylvestre/treeherder,tojonmz/treeherder,jgraham/treeherder,deathping1994/treeherder,avih/treeherder,wlach/treeherder,wlach/treeherder,vaishalitekale/treeherder,adusca/treeherder,deathping1994/treeherder,vaishalitekale/treeherder,vaishalitekale/treeherder,adusca/treeherder,akhileshpillai/treeherder,adusca/treeherder,glenn124f/treeherder,moijes12/treeherder,kapy2010/treeherder,gbrmachado/treeherder,deathping1994/treeherder,avih/treeherder,rail/treeherder,deathping1994/treeherder,vaishalitekale/treeherder,moijes12/treeherder,glenn124f/treeherder,KWierso/treeherder,kapy2010/treeherder,moijes12/treeherder,edmorley/treeherder,sylvestre/treeherder,jgraham/treeherder,sylvestre/treeherder,tojon/treeherder,deathping1994/treeherder,gbrmachado/treeherder,avih/treeherder,vaishalitekale/treeherder,jgraham/treeherder,avih/treeherder,tojonmz/treeherder,kapy2010/treeherder,sylvestre/treeherder,adusca/treeherder,gbrmachado/treeherder,vaishalitekale/treeherder,gbrmachado/treeherder,tojon/treeherder,jgraham/treeherder,edmorley/treeherder,tojonmz/treeherder,gbrmachado/treeherder,rail/treeherder,KWierso/treeherder,glenn124f/treeherder,kapy2010/treeherder,rail/treeherder,edmorley/treeherder,jgraham/treeherder,akhileshpillai/treeherder,moijes12/treeherder,parkouss/treeherder,akhileshpillai/treeherder,parkouss/treeherder,edmorley/treeherder,rail/treeherder,tojonmz/treeherder,adusca/treeherder,parkouss/treeherder,tojonmz/treeherder,parkouss/treeherder,kapy2010/treeherder,tojon/treeherder,gbrmachado/treeherder,akhileshpillai/treeherder,tojonmz/treeherder,glenn124f/treeherder,KWierso/treeherder,avih/treeherder,KWierso/treeherder,wlach/treeherder,akhileshpillai/treeherder,deathping1994/treeherder,moijes12/treeherder,jgraham/treeherder,glenn124f/treeherder,wlach/treeherder,avih/treeherder,sylvestre/treeherder,akhileshpillai/treeherder,parkouss/treeherder,parkouss/treeherder,tojon/treeherder,rail/treeherder,rail/treeherder,moijes12/treeherder,wlach/treeherder,adusca/treeherder