Chryseobacterium hilariae sp. nov., Sphingomonas larreae sp. nov., Sphingomonas astragali sp. nov., Sphingomonas radicis sp. nov., Variovorax stachyos sp. nov., Parapedobacter brassicae sp. nov., Neorhizobium descurainiae sp. nov., and Erwinia artemisiae sp. nov. isolated from dry soils revealing a diverse plant growth promoting potential