BHK/P alignments (#2115)
* Constants * Unused import? * Cargo.lock * Unused deps * TODO: fix doc or reimport? * Try to aviod redefine para_id constant for `RefundableParachainId` * Checked and removed TODOs
* Constants * Unused import? * Cargo.lock * Unused deps * TODO: fix doc or reimport? * Try to aviod redefine para_id constant for `RefundableParachainId` * Checked and removed TODOs