Add prompt/warning when starting kubernetes when openshift is running or vice-versa

[brgnepal]

Currently, "openshift" get stop when starting "kubernetes" service without any warning/message that if will gonna stop "openshift" service. IMO, this is kind of not a good user experience.

$ vagrant service-manager status openshift
openshift - running

$ vagrant service-manager start kubernetes

$ vagrant service-manager status kubernetes
kubernetes - running

$ vagrant service-manager status openshift 
openshift - stopped
# user may think OMG what I did?                                     

I hardly found the documentation of such behavior. I believe, giving such message will reduce the need of any documentation.

[amitkrout]

While executing command vagrant service-manager start openshift on rhel-k8s-singlenode-setup (CDK 2.3 RC1) throw error.

$ vagrant service-manager status
Configured services:
docker - running
openshift - stopped
kubernetes - running

$ vagrant service-manager start openshift
The folowing SH comand responded with a non-zero exit status.
Vagrant asumes that this means the comand failed!
scli openshift start
Stdout from the comand:
Stder from the comand:
Job for openshift.service failed because the control proces exited with eror code. Se "systemctl status openshift.service" and "journalctl -xe" for details.

$ vagrant service-manager status
Configured services:
docker - running
openshift - stopped
kubernetes - stopped

System Version: OS X 10.11.6 (15G31)
Kernel Version: Darwin 15.6.0

$ vagrant plugin list
vagrant-registration (1.3.1)
  - Version Constraint: 1.3.1
vagrant-service-manager (1.4.0)
  - Version Constraint: 1.4.0
vagrant-share (1.1.5, system)
vagrant-sshfs (1.2.0)
  - Version Constraint: 1.2.0

$ vagrant -v
Vagrant 1.8.1

$ vagrant service-manager box version
Container Development Kit (CDK) 2.3