[#12016] Prepared methods for fetching most of the objects that will be saved into SPADe

• removed unused methods in JiraPump (they were moved or replaced by methods in services)
• prepared most of the methods that will fetch objects that will be saved into SPADe
• for these methods, created markdown comments about future mapping into SPADe

src/main/java/com/pump/jira/service/AttachmentService.java

@@ -21,10 +21,10 @@ public class AttachmentService {
     @Value("${jira.project.key}")
     private String projectKey;
 
-    @Value("${jira.max.issues:100}")
+    @Value("${jira.max.issues}")
     private int maxIssues;
 
-    @Value("${jira.timeout.seconds:30}")
+    @Value("${jira.timeout.seconds}")
     private int timeoutSeconds;
 
     /// id -> Artifact.externalId -> TODO NOT EXISTING