db - set maximum pool size

kbazaar/src/main/resources/application.properties

@@ -12,7 +12,7 @@ spring.datasource.url=
 spring.datasource.username=
 spring.datasource.password=
 spring.datasource.driver-class-name=org.postgresql.Driver
-spring.datasource.maximumPoolSize=1
+spring.datasource.hikari.maximum-pool-size=1
 
 spring.sql.init.mode=always
 spring.sql.init.schema-locations=classpath:sql/schema/*.sql