[postgres] Use new style properties

* Use new property helpers
* Added properties to spec

Change-Id: I7fb88fb93b9c844ca13c4fa839c09678968f81b2
Merge "[postgres] Use new style properties"
[blobstore] Use new style properties

* Use new property helpers
* Added properties to spec

Change-Id: Idf7b60b65445eceaae134d8c118f1d12900abe12
[nats] Use new style properties

* Use new property helpers
* Added properties to spec

Change-Id: Ib8001944d64ce21f4432e09b7c99da11f23500b1