Release 1.15.1

What's Changed

• Use full path to authorized_key module by @priteau in #116
• Fix ansible-lint errors by @priteau in #134
• Fix ansible-tests on 2.16 by @mnasiadka in #136
• Fix spec indentation in cluster.yml by @priteau in #133
• fix: add missing y and backtick by @jackhodgkiss in #125
• Add Reef support by @cityofships in #127
• Fix cluster spec by @cityofships in #138
• Define cluster network with cephadm bootstrap by @priteau in #140
• prepare 1.15.1 release by @bbezak in #141

Full Changelog: 1.14.0...1.15.1