Update dependencies

[ldez]

What does this PR do?

Update dependencies:

• https://github.com/cenkalti/backoff/compare/v3.1.1..v3.2.2
• https://github.com/miekg/dns/compare/v1.1.21..v1.1.27
• https://github.com/unrolled/render/compare/v1.0.1..v1.0.2
• https://github.com/unrolled/secure/compare/v1.0.6..v1.0.7
• https://github.com/stretchr/testify/compare/v1.4.0..v1.5.1
• https://github.com/go-yaml/yaml/compare/v2.2.7..v2.2.8
• https://github.com/jaegertracing/jaeger-client-go/compare/v2.21.1..v2.22.1
• https://github.com/docker/engine/compare/v19.03.5..v19.03.6#diff-4061fcef378a6d912e14e2ce162a1995
• https://github.com/kubernetes/api/compare/b59d8169aab5..v0.17.3
• https://github.com/kubernetes/apimachinery/compare/1799e75a0719..v0.17.3
• https://github.com/kubernetes/client-go/compare/8e956561bbf5..v0.17.3
• https://github.com/kubernetes/code-generator/compare/18da4a14b22b..v0.17.3
• https://github.com/docker/cli/compare/5b38d82aa076..740919cc7fc0
• https://github.com/golang/protobuf/compare/v1.3.2..v1.3.3
• https://github.com/coreos/go-systemd/compare/fd7a80b32e1f..d3cd4ed1dbcf
• https://github.com/instana/go-sensor/compare/v1.5.0..v1.5.1

Motivation

Keep lib in sync.

More

• [ ] Added/updated tests
• [ ] Added/updated documentation

[juliens]

LGTM