adding variable propagation for notification-email

[bschlaman]

Fixes #1073

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[bschlaman]

/assign @whaught

[bschlaman]

@googlebot I signed it!

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[bschlaman]

/woof

[google-oss-robot]

@bschlaman:

In response to this:

/woof

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[whaught]

/ok-to-test

[whaught]

/lgtm

[whaught]

Suggested change

	notification-email = var.notification-email
	notification-email = var.notification-email

notification-email = var.notification-email

[whaught]

I can't tell if that suggestion actually worked, but the whitespace looks off

[google-oss-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: bschlaman, whaught

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