
when get dataframes with `cloudkitty storage-dataframe-list`, begin and end is mandatory. make it optional like get total Change-Id: I0a0f4073888621833b0bb6588a0452a642327797 Closes-Bug: #1640372
when get dataframes with `cloudkitty storage-dataframe-list`, begin and end is mandatory. make it optional like get total Change-Id: I0a0f4073888621833b0bb6588a0452a642327797 Closes-Bug: #1640372