scylladb

test.py: fix issue that C++ tests' logs are deleted

Merge 'test/cluster: fix server-starting functions to wait for all ports' from Nadav Har'El

Merge 'strong_consistency: wait for raft servers to start in create table' from Michael Litvak

Merge 'strong_consistency: limit available consistency levels in strong consistent requests' from Michał Jadwiszczak

Merge 'db/view/view_building: replace system keyspace functions with mutation builder' from Michał Jadwiszczak