upgrade: allow upgrades without version change
upgrade: allow upgrades without version change

Paused workers test requires watching upgrade to complete on final stage when worker pools is resumed and upgrade proceeds. This commit would record this warning in the log instead of throwing the error.

openshift/origin,soltysh/origin,gabemontero/origin,deads2k/origin,akram/origin,coreydaley/origin,mfojtik/origin,akram/origin,akram/origin,bparees/origin,openshift/origin,xiuwang/origin,gabemontero/origin,xiuwang/origin,gabemontero/origin,jsafrane/origin,deads2k/origin,coreydaley/origin,JacobTanenbaum/origin,jsafrane/origin,openshift/origin,mahak/origin,hroyrh/origin,JacobTanenbaum/origin,sallyom/origin,coreydaley/origin,mahak/origin,deads2k/origin,csrwng/origin,csrwng/origin,mahak/origin,csrwng/origin,soltysh/origin,soltysh/origin,hroyrh/origin,bparees/origin,jsafrane/origin,sallyom/origin,JacobTanenbaum/origin,xiuwang/origin,bparees/origin,hroyrh/origin,mfojtik/origin,sallyom/origin,mfojtik/origin