Enable docker container support in VSO integration tests (#590)

* Add container scripts for VSO builds

* Remove relative path from kubectl.exe

* Use a variable and iex for kubectl path

* Use envvar for working dir path

* Try agent directory

* Update kubeconfig path

* Write connection settings json in build script

* Output logging

* remove _work prefix

* End end point instead of service name

* Disable failing tests

* Change service name prefix so it's different than SSMS containers

scripts/CleanupKubernetesTarget.ps1

@@ -0,0 +1,9 @@
+Param (
+    $svcName = $env:k8ServiceName
+)
+$env:KUBECONFIG = $env:AGENT_WORKFOLDER + "\kubeconfig.centralus.json"
+
+$kube = $env:AGENT_WORKFOLDER + "\kubectl.exe"
+
+iex "$kube delete service $svcName"
+iex "$kube delete deployment $svcName"