test/extended/router: add certgen
test/extended/router: add certgen

Utility functions for creating crt/key for Route's.

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