Configure MySQL connector to log queries that are slower than 500ms.

For travis profile I also enabled explainSlowQueries parameter.

@see http://dev.mysql.com/doc/connector-j/5.1/en/connector-j-reference-configuration-properties.html

No functional changes.

Author: php-coder

src/main/resources/application-prod.properties

@@ -1,6 +1,6 @@
 spring.profiles: prod
 
-spring.datasource.url: jdbc:mysql://localhost:3306/mystamps?logger=com.mysql.jdbc.log.Slf4JLogger&useSSL=false
+spring.datasource.url: jdbc:mysql://localhost:3306/mystamps?logger=com.mysql.jdbc.log.Slf4JLogger&useSSL=false&logSlowQueries=true&slowQueryThresholdMillis=500&autoSlowLog=false
 spring.datasource.username: mystamps
 spring.datasource.password: q1
 spring.datasource.driver-class-name: com.mysql.jdbc.Driver

src/main/resources/application-travis.properties

@@ -1,6 +1,6 @@
 spring.profiles: travis
 
-spring.datasource.url: jdbc:mysql://localhost:3306/mystamps?logger=com.mysql.jdbc.log.Slf4JLogger&useSSL=false
+spring.datasource.url: jdbc:mysql://localhost:3306/mystamps?logger=com.mysql.jdbc.log.Slf4JLogger&useSSL=false&logSlowQueries=true&slowQueryThresholdMillis=500&autoSlowLog=false&explainSlowQueries=true
 spring.datasource.username: travis
 spring.datasource.password:
 spring.datasource.driver-class-name: com.mysql.jdbc.Driver