util: fix memleak in virStorageSourceClear
util: fix memleak in virStorageSourceClear

snapshot and configFile are not freed, free them.

Signed-off-by: Zhang Bo <cae72d1e73283b1efb9f7d3401b1ea60af16bc40@huawei.com>

jardasgit/libvirt,agx/libvirt,jfehlig/libvirt,nertpinx/libvirt,VenkatDatta/libvirt,datto/libvirt,zippy2/libvirt,fabianfreyer/libvirt,eskultety/libvirt,libvirt/libvirt,VenkatDatta/libvirt,datto/libvirt,eskultety/libvirt,libvirt/libvirt,fabianfreyer/libvirt,taget/libvirt,VenkatDatta/libvirt,agx/libvirt,andreabolognani/libvirt,jardasgit/libvirt,taget/libvirt,agx/libvirt,andreabolognani/libvirt,nertpinx/libvirt,nertpinx/libvirt,eskultety/libvirt,jfehlig/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,olafhering/libvirt,crobinso/libvirt,rlaager/libvirt,datto/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,rlaager/libvirt,crobinso/libvirt,andreabolognani/libvirt,rlaager/libvirt,rlaager/libvirt,eskultety/libvirt,taget/libvirt,nertpinx/libvirt,olafhering/libvirt,agx/libvirt,fabianfreyer/libvirt,zippy2/libvirt,agx/libvirt,VenkatDatta/libvirt,taget/libvirt,crobinso/libvirt,zippy2/libvirt,taget/libvirt,olafhering/libvirt,rlaager/libvirt,libvirt/libvirt,nertpinx/libvirt,jfehlig/libvirt,jardasgit/libvirt,eskultety/libvirt,zippy2/libvirt,crobinso/libvirt,jardasgit/libvirt,datto/libvirt,olafhering/libvirt,datto/libvirt,jfehlig/libvirt,andreabolognani/libvirt,libvirt/libvirt,VenkatDatta/libvirt