Merge tag '2.16.2'

version 2.16.2

Cluster: do not prolong the lifetime of Cluster for PrepareHostHandler

It was supposed to fix a crash when "host up" event interleaves with
the destruction of Cluster object, but it introduced another bug, which
can be observed e.g. in ControlConnectionTests.Integration_Cassandra_FullOutage
integration test. The bug is that `EventLoop` still has working "timer handle"
while being destroyed and, in turn, segfaults.

Merge pull request scylladb#17 from jul-stas/release-scripts

Release as `scylla-cpp-driver`

version 2.15.2

fix CASS_INSTALL_HEADER_IN_SUBDIR usage

version 2.15.0

version 2.14.1

Merge pull request datastax#458 from datastax/2.14.0_prep

2.14.0 release preparation

Merge pull request datastax#450 from datastax/2.13.0_release_prep

OSS v2.13.0 release preparations

Merge pull request datastax#441 from datastax/2.12.0_prep

OSS 2.12.0 preparation