v1.5.9

What's Changed

• CI: add variable for node count by @vipul-21 in #2088
• ci: Parameterize test-validate-state by @jpayne3506 in #2109
• Swift v2 CNS design by @rbtr in #2093
• ci: Update dns tests for k8s conformance by @jpayne3506 in #2104
• ci: adding cni package as a trigger by @vipul-21 in #2108
• put back the config to write logs to the file instead of only stdout logs by @paulyufan2 in #2107

Full Changelog: v1.5.8...v1.5.9