commands/operator-sdk: operator-sdk new now performs k8s codegen

[fanminshi]

fixes #107

[fanminshi]

Manual Test:

$ operator-sdk new memcached-operator --api-version=cache.example.com/v1alpha1 --kind=Memcached

Run code-generation for custom resources
Generating deepcopy funcs

$ tree memcached-operator/pkg/apis/
memcached-operator/pkg/apis/
└── cache
    └── v1alpha1
        ├── doc.go
        ├── register.go
        ├── types.go
        └── zz_generated.deepcopy.go

[fanminshi]

cc/ @hasbro17

[hasbro17]

@fanminshi Did you double check that the existing operator-sdk generate k8s command still works fine as well?

[fanminshi]

@hasbro17 let me double check.

[fanminshi]

Yeah I checked and it still works fine.

$ operator-sdk new memcached-operator --api-version=cache.example.com/v1alpha1 --kind=Memcached

Run code-generation for custom resources
Generating deepcopy funcs

$ cd memcached-operator/

$ operator-sdk generate k8s
Run code-generation for custom resources
Generating deepcopy funcs

fanmins-MacBook-Pro:memcached-operator fanminshi$ operator-sdk build quay.io/coreos/operator-sdk-dev:memcached-operator
building memcached-operator...

building container quay.io/coreos/operator-sdk-dev:memcached-operator...
Sending build context to Docker daemon    126MB
Step 1/4 : FROM alpine:3.6
 ---> 7328f6f8b418
Step 2/4 : ADD tmp/_output/bin/memcached-operator /usr/local/bin/memcached-operator
 ---> Using cache
 ---> dfc8a3474f46
Step 3/4 : RUN adduser -D memcached-operator
 ---> Using cache
 ---> d295ab19460e
Step 4/4 : USER memcached-operator
 ---> Using cache
 ---> 8159c7fcf2a9
Successfully built 8159c7fcf2a9
Successfully tagged quay.io/coreos/operator-sdk-dev:memcached-operator

[hasbro17]

LGTM