Populate data during build

This is to save time by avoiding creating test data again and again. Also being used for repository test.

Closed #12
Inform spring boot to continue on error

Inform spring boot to proceed when hits into error. This is related to datasource. Such errors are table or data are already exists.

Fixed #13
Include Authorization in Access-Control-Allow-Headers

With 'Authorization' Spring Boot will not be able to authorize any request.

Fixed #11