[opensuse-buildservice] Look to correct repository in the function 'expandsearchpath'

Hello. I offer a patch for the review. The simple description: The project configuration can have several paths, for example with prebuild packets. RPM-packets search for build root is performed only on the last path. And the build can end with an error 'getbinaries: missing packages:'. Also I not sure about processing of remote url. -- Best regards, Oleg Ogurtsov. Samsung R&D Institute Russia, e-mail: o.ogurtsov@samsung.com