add: proper msg for group delete

components/device-mgt/io.entgra.device.mgt.core.device.mgt.api/src/main/java/io/entgra/device/mgt/core/device/mgt/api/jaxrs/service/impl/GroupManagementServiceImpl.java

@@ -475,8 +475,8 @@ public class GroupManagementServiceImpl implements GroupManagementService {
             log.error(msg, e);
             return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();
         } catch (GroupAlreadyExistException e) {
-            String msg = "Group already exists with name : " + groups.getName() + ".";
-            log.warn(msg);
+            String msg = "Group already exists with name : " + groups.getName() + " Try with another group name.";
+            log.error(msg, e);
             return Response.status(Response.Status.CONFLICT).entity(msg).build();
         } catch (RoleDoesNotExistException e) {
             return Response.status(Response.Status.BAD_REQUEST).entity(e.getMessage()).build();

components/device-mgt/io.entgra.device.mgt.core.device.mgt.api/src/main/java/io/entgra/device/mgt/core/device/mgt/api/jaxrs/service/impl/admin/GroupManagementAdminServiceImpl.java

@@ -187,8 +187,8 @@ public class GroupManagementAdminServiceImpl implements GroupManagementAdminServ
             log.error(msg, e);
             return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();
         } catch (GroupAlreadyExistException e) {
-            String msg = "Group already exists with name : " + group.getName() + ".";
-            log.warn(msg);
+            String msg = "Group already exists with name : " + group.getName() + " Try with another group name.";
+            log.error(msg, e);
             return Response.status(Response.Status.CONFLICT).entity(msg).build();
         } catch (RoleDoesNotExistException e) {
             return Response.status(Response.Status.BAD_REQUEST).entity(e.getMessage()).build();

components/device-mgt/io.entgra.device.mgt.core.device.mgt.core/src/main/java/io/entgra/device/mgt/core/device/mgt/core/service/GroupManagementProviderService.java

@@ -57,7 +57,7 @@ public interface GroupManagementProviderService {
      * @param defaultPermissions of the default role
      * @throws GroupManagementException
      */
-    void createGroupWithRoles(DeviceGroupRoleWrapper groups, String defaultRole, String[] defaultPermissions) throws GroupManagementException, GroupAlreadyExistException, RoleDoesNotExistException;
+    void createGroupWithRoles(DeviceGroupRoleWrapper groups, String defaultRole, String[] defaultPermissions) throws  GroupAlreadyExistException,GroupManagementException, RoleDoesNotExistException;
 
     /**
      * Update existing device group.

components/device-mgt/io.entgra.device.mgt.core.device.mgt.core/src/main/java/io/entgra/device/mgt/core/device/mgt/core/service/GroupManagementProviderServiceImpl.java

@@ -148,7 +148,7 @@ public class GroupManagementProviderServiceImpl implements GroupManagementProvid
         }
     }
 
-    public void createGroupWithRoles(DeviceGroupRoleWrapper groups, String defaultRole, String[] defaultPermissions) throws GroupManagementException {
+    public void createGroupWithRoles(DeviceGroupRoleWrapper groups, String defaultRole, String[] defaultPermissions) throws GroupAlreadyExistException, GroupManagementException {
         if (groups == null) {
             String msg = "Received incomplete data for createGroup";
             log.error(msg);
@@ -181,7 +181,7 @@ public class GroupManagementProviderServiceImpl implements GroupManagementProvid
                 }
                 GroupManagementDAOFactory.commitTransaction();
             } else {
-                throw new GroupManagementException("Group exist with name " + groups.getName());
+                throw new GroupAlreadyExistException("Group already exists with name : " + groups.getName() + " Try with another group name.");
             }
         } catch (GroupManagementDAOException e) {
             GroupManagementDAOFactory.rollbackTransaction();