Dev/251 refactor logging

Created by: KFilippopolitis

Refactored all logs.

1. Disabled spring boot framework logs.
2. Added 2 logs at every endpoint, when entering and returning, with useful information.
3. Unified the logs output.
4. Reworked the output in order for it to be visually consistent.

src/main/java/eu/hbp/mip/configuration/PersistenceConfiguration.java

@@ -23,7 +23,7 @@ public class PersistenceConfiguration {
 
     @Primary
     @Bean(name = "portalDatasource")
-    @ConfigurationProperties(prefix="spring.portalDatasource")
+    @ConfigurationProperties(prefix = "spring.portalDatasource")
     public DataSource portalDataSource() {
         return DataSourceBuilder.create().build();
     }