Improve e2e tests (#1111)

* icnrease vm size

* cache deps

* switch to the absolute cache path as cdp does not support shell expansion

* do not pull non-existing image

* manually install kind

* add alias to kind

* use full kind name

* one more name change

* install kind with other tools

* add bind mounts instead of copying files

* test fetching the runner image

* build image for pierone

* bump up the client-go version to match the master

* bump up go version

* install pinned version of kind before any test run

* do not overwrite local ./manifests during test run

* update the docs

* fix kind name

* update go.* files

* fix deps

* avoid unnecessary image upload

* properly install kind

* Change network to host to make it reachable within e2e runner. May not be the right solution though.

* Small changes. Also use entrypoint vs cmd.

* Bumping spilo. Load before test.

* undo incorrect merge from the master

Co-authored-by: Sergey Dudoladov <sergey.dudoladov@zalando.de>
Co-authored-by: Jan Mußler <janm81@gmail.com>

go.mod

@@ -10,12 +10,12 @@ require (
 	github.com/sirupsen/logrus v1.6.0
 	github.com/stretchr/testify v1.5.1
 	golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9
-	golang.org/x/tools v0.0.0-20200826040757-bc8aaaa29e06 // indirect
+	golang.org/x/tools v0.0.0-20200828161849-5deb26317202 // indirect
 	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
 	gopkg.in/yaml.v2 v2.2.8
 	k8s.io/api v0.18.8
 	k8s.io/apiextensions-apiserver v0.18.0
 	k8s.io/apimachinery v0.18.8
-	k8s.io/client-go v0.18.6
+	k8s.io/client-go v0.18.8
 	k8s.io/code-generator v0.18.8
 )