Parameterized VPC and security group for RDS

[aniketbhatnagar]

DBSubnetGroupName and EC2VpcId can now be passed as ParameterRef

[coveralls]

Coverage decreased (-0.1%) to 52.746% when pulling 6be3252 on aniketbhatnagar:Parameterizing-VPC-And-SecurityGroups-For-RDS into 3606e93 on MonsantoCo:master.

[coveralls]

Coverage decreased (-0.05%) to 52.833% when pulling ef5c76e on aniketbhatnagar:Parameterizing-VPC-And-SecurityGroups-For-RDS into 3606e93 on MonsantoCo:master.

[coveralls]

Coverage increased (+0.2%) to 53.095% when pulling b39982a on aniketbhatnagar:Parameterizing-VPC-And-SecurityGroups-For-RDS into 3606e93 on MonsantoCo:master.

[tjcorr]

LGTM, merging. Do you need me to cut a release now or should I wait until we get your other issue sorted out?

[aniketbhatnagar]

I think we should wait until the other issue is sorted. No rush. Thanks :-)