don't reply if command is empty

Merge pull request keel-hq#374 from keel-hq/feature/registry-client-f…

…ix-371

updating registry client

more errors when secrets not found

Merge pull request keel-hq#360 from keel-hq/feature/basic_auth

Feature/basic auth

Merge pull request keel-hq#344 from keel-hq/feature/http_registries

Feature/http registries

Merge pull request keel-hq#328 from keel-hq/feature/helm_approvals_de…

…adline

fixed a problem with helm approvals not getting default deadline

Merge pull request keel-hq#327 from keel-hq/feature/301_better_regist…

…ry_matching

Feature/301 better registry matching

Merge pull request keel-hq#313 from keel-hq/feature/306_private_poll

Feature/306 private poll

Merge pull request keel-hq#302 from keel-hq/feature/policy_from_annot…

…ations

Feature/policy from annotations

arm build