add OPERATOR_NAME env var

[sebgoa]

otherwise operator-sdk up local fails.

[openshift-ci-robot]

Hi @sebgoa. Thanks for your PR.

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[shawn-hurley]

LGTM

[hasbro17]

It won't technically fail but print out an error as is reported in #462

$ operator-sdk up local
INFO[0000] Go Version: go1.10.2
INFO[0000] Go OS/Arch: darwin/amd64
INFO[0000] operator-sdk Version: 0.0.6+git
ERRO[0000] failed to initialize service object for operator metrics: OPERATOR_NAME must be set
INFO[0000] Watching app.example.com/v1alpha1, AppService, default, 5000000000

But this should help suppress that error.
LGTM

@lilic We should move OPERATOR_NAME inside up local like you've suggested before
#462 (comment)