Upgrate Ring testcases

[yanganto]

• fix the 42 test cases of Ring pallet
• remove test case with extend_lock in Ring pallet
• base on Hotfox/fix ci #260

[yanganto]

The result of test cases of Ring pallet

running 42 tests
test tests::account_create_on_free_too_low ... ok
test tests::account_create_on_free_too_low_with_other ... ok
test tests::account_removal_on_free_too_low ... ok
test tests::balance_transfer_when_reserved_should_not_work ... ok
test tests::balance_transfer_works ... ok
test tests::burn_must_work ... ok
test tests::cannot_set_genesis_value_below_ed ... ok
test tests::balance_works ... ok
test tests::basic_locking_should_work ... ok
test tests::deducting_balance_should_work ... ok
test tests::combination_locking_should_work ... ok
test tests::check_vesting_status ... ok
test tests::default_indexing_on_new_accounts_should_not_work2 ... ok
test tests::double_locking_should_work ... ok
test tests::dust_account_removal_should_work2 ... ok
test tests::dust_account_removal_should_work ... ok
test tests::force_transfer_works ... ok
test tests::liquid_funds_should_transfer_with_delayed_vesting ... ok
test tests::extra_balance_should_transfer ... ok
test tests::lock_removal_should_work ... ok
test tests::lock_block_number_should_work ... ok
test tests::lock_replacement_should_work ... ok
test tests::refunding_balance_should_work ... ok
test tests::dust_moves_between_free_and_reserved ... ok
test tests::partial_locking_should_work ... ok
test tests::reserving_balance_should_work ... ok
test tests::lock_reasons_should_work ... ok
test tests::reward_should_work ... ok
test tests::slashing_balance_should_work ... ok
test tests::slashing_incomplete_balance_should_work ... ok
test tests::reserved_balance_should_prevent_reclaim_count ... ok
test tests::transfer_overflow_isnt_exploitable ... ok
test tests::slashing_reserved_balance_should_work ... ok
test tests::slashing_incomplete_reserved_balance_should_work ... ok
test tests::transfer_keep_alive_works ... ok
test tests::transferring_too_high_value_should_not_panic ... ok
test tests::transferring_reserved_balance_should_work ... ok
test tests::unreserving_balance_should_work ... ok
test tests::transferring_reserved_balance_to_nonexistent_should_fail ... ok
test tests::transferring_incomplete_reserved_balance_should_work ... ok
test tests::vested_balance_should_transfer ... ok
test tests::unvested_balance_should_not_transfer ... ok

test result: ok. 42 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out

   Doc-tests darwinia-ring

running 2 tests
test src/lib.rs -  (line 109) ... ok
test src/lib.rs -  (line 123) ... ok

test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out

[yanganto]

Rebase develop

[yanganto]

remove cache and everything is good and quick.