Try creating Schema in following way.
1. Drop cascade public schema in your sthana database
2. create public schema again. It will be schema without sthana tables.
2. cd to $HOME/sthana/sthana/src/ sthana/sthana-core
3. gradle flywayMigrate
This 3rd command should automatically create a schema with sthana tables for you. When you create data SQL, it should look like V2__data.sql. Put V2__data.sql in same folder as V1__init.sql. Then if you run "gradle flywayMigrate" your database should get updated with data also.