Don't assume VPCs have tags

[jmcs]

Fixes #346

[hjacobs]

you can make this much shorter by using tags or []

[coveralls]

Coverage decreased (-0.02%) to 89.055% when pulling 29519e6 on tags-and-create into e033177 on master.

[hjacobs]

Unit test? 😏

[coveralls]

Coverage increased (+0.003%) to 89.083% when pulling bf7f7be on tags-and-create into e033177 on master.

[coveralls]

Coverage increased (+0.003%) to 89.083% when pulling bf11195 on tags-and-create into e033177 on master.

[hjacobs]

👍