2.7.0

What's Changed

• Add run_single_user and documentation on how to debug Users/locustfiles by @cyberw in #1985
• Fix "socket operation on non-socket" at shutdown, by reverting #1935 by @cyberw in #1991

Small fixes/improvements:

• Fixing issue #1961 with incorrect "All users spawned" log messages wh… by @EzR1d3r in #1977
• unit tests: add extra validations in integration tests by @cyberw in #1990
• Add 99%ile for Web UI by @FooQoo in #1989
• hardening Environment.shape_class for distinct usage by @uddmorningsun in #1983

Full Changelog: 2.6.1...2.7.0