Backports to 1.11.7-stable (#9093)

* parity-version: stabelize 1.11

* parity-version: bump stable to 1.11.7

* Don't fetch snapshot chunks at random (#9088)

* Offload cull to IoWorker.

* Limit the number of transactions in pending set (#8777)

* Unordered iterator.

* Use unordered and limited set if full not required.

* Split timeout work into smaller timers.

* Avoid collecting all pending transactions when mining

* Remove println.

* Use priority ordering in eth-filter.

* Fix ethcore-miner tests and tx propagation.

* Review grumbles addressed.

* Add test for unordered not populating the cache.

* Fix ethcore tests.

* Fix light tests.

* Fix ethcore-sync tests.

* Fix RPC tests.

* Make sure to produce full blocks.

* Update hidapi, fixes #7542 (#9108)

* docker: add cmake dependency (#9111)

* Fix miner tests.

* Revert "Make sure to produce full blocks."

This reverts commit b12d5920.

* Update light client hardcoded headers (#9098)

* Insert Kovan hardcoded headers until #7690241

* Insert Kovan hardcoded headers until block 7690241

* Insert Ropsten hardcoded headers until #3612673

* Insert Mainnet hardcoded headers until block 5941249

* Make sure to produce full blocks. (#9115)

* Insert ETC (classic) hardcoded headers until block #6170625 (#9121)

* fix verification in ethcore-sync collect_blocks (#9135)

* `evm bench` fix broken dependencies (#9134)

* `evm bench` use valid dependencies

Benchmarks of the `evm` used stale versions of a couple a crates that
this commit fixes!

* fix warnings