Refactor sr_primitives. (#3214)

* refactor sr_primitives.

* Fix try build error.

* Line-width

* Ui test.

* Final fixes.

* Fix build again.

* bring back ui test.

* Fix unsigned import.

* Another ui fix.

* Also refactor substrate-primitives

* Fix benchmarks.

* Fix doc test.

* fix doc tests

substrate/core/transaction-pool/graph/src/base_pool.rs

@@ -27,7 +27,7 @@ use std::{
 
 use log::{trace, debug, warn};
 use serde::Serialize;
-use substrate_primitives::hexdisplay::HexDisplay;
+use primitives::hexdisplay::HexDisplay;
 use sr_primitives::traits::Member;
 use sr_primitives::transaction_validity::{
 	TransactionTag as Tag,

substrate/core/transaction-pool/graph/src/future.rs

@@ -22,7 +22,7 @@ use std::{
 	time,
 };
 
-use substrate_primitives::hexdisplay::HexDisplay;
+use primitives::hexdisplay::HexDisplay;
 use sr_primitives::transaction_validity::{
 	TransactionTag as Tag,
 };