Update buffer folder and files naming convention

All references to folders and files inside buffer were updated.
- Base folder to write detector: detector_folder
- Name of the modules inside detector_folder: module_name
- Data grouping folders based on pulse_id: data_folder
- Data grouping files, based on pulse_id: data_file

core-buffer/test/test_buffer_utils.cpp

@@ -9,33 +9,33 @@ TEST(BufferUtils, get_filename)
     auto expected_file = "/root/device-1/12300000/12345000" +
                          buffer_config::FILE_EXTENSION;
 
-    auto root_folder = "/root";
-    auto device_name = "device-1";
+    auto detector_folder = "/root";
+    auto module_name = "device-1";
 
     auto result = BufferUtils::get_filename(
-            root_folder,
-            device_name,
+            detector_folder,
+            module_name,
             12345000);
 
     ASSERT_EQ(result, expected_file);
 
     auto result2 = BufferUtils::get_filename(
-            root_folder,
-            device_name,
+            detector_folder,
+            module_name,
             12345999);
 
     ASSERT_EQ(result2, expected_file);
 
     auto result3 = BufferUtils::get_filename(
-            root_folder,
-            device_name,
+            detector_folder,
+            module_name,
             12346000);
 
     ASSERT_NE(result3, expected_file);
 
     auto result4 = BufferUtils::get_filename(
-            root_folder,
-            device_name,
+            detector_folder,
+            module_name,
             12344999);
 
     ASSERT_NE(result4, expected_file);