* make pallet-tips & pallet-bounties instantiable

* update test

* add default instance

* update

* cargo fmt

* update

* update

* update

* update

* fix merge

* fix tests

* bounties benchmarking instantiable

* fix benchmarks

* make tips benchmarks instantible

Co-authored-by: Shawn Tabrizi <shawntabrizi@gmail.com>