Fix error response model
Update DPO model
## [1.7.3] - 10/08/2020
- - [DCAEGEN2-2264](https://jira.onap.org/browse/DCAEGEN2-2264) - Add implementation of stndDefined fields validation
\ No newline at end of file
+ - [DCAEGEN2-2264](https://jira.onap.org/browse/DCAEGEN2-2264) - Add implementation of stndDefined fields validation
+## [1.7.4] - 04/08/2020
+ - [DCAEGEN2-2212](https://jira.onap.org/browse/DCAEGEN2-2212) - Config fetch for VESCollector through DCAE-SDK (CBS Client)