basis.net.jsonp: fix issues with request concurrency and request abort
basis.net.jsonp: fix issues with request concurrency and request abort

tyanas/basisjs,tyanas/basisjs,istrel/basisjs,smelukov/basisjs,fateevv/basisjs,basisjs/basisjs,fateevv/basisjs,istrel/basisjs,fateevv/basisjs,istrel/basisjs,basisjs/basisjs,basisjs/basisjs,smelukov/basisjs,tyanas/basisjs,smelukov/basisjs