samples: Clean up DLP region tags. (#1051)

Author: jmdobry

dlp/snippets/snippets/src/main/java/com/example/dlp/DeIdentification.java

@@ -46,7 +46,7 @@ private static void deIdentifyWithMask(
       String string,
       Character maskingCharacter,
       int numberToMask) {
-    // [START dlp_deidentify_mask]
+    // [START dlp_deidentify_masking]
     /**
      * Deidentify a string by masking sensitive information with a character using the DLP API.
      * @param string The string to deidentify.
@@ -113,7 +113,7 @@ private static void deIdentifyWithMask(
     } catch (Exception e) {
       System.out.println("Error in deidentifyWithMask: " + e.getMessage());
     }
-    // [END dlp_deidentify_mask]
+    // [END dlp_deidentify_masking]
   }
 
   private static void deIdentifyWithFpe(

dlp/snippets/snippets/src/main/java/com/example/dlp/Metadata.java

@@ -49,7 +49,7 @@ private static void listInfoTypes(String category, String languageCode) throws E
   }
 
   private static void listRootCategories(String languageCode) throws Exception {
-    // [START dlp_list_root_categories]
+    // [START dlp_list_categories]
     // Instantiate a DLP client
     try (DlpServiceClient dlpClient = DlpServiceClient.create()) {
       // The BCP-47 language code to use, e.g. 'en-US'
@@ -61,7 +61,7 @@ private static void listRootCategories(String languageCode) throws Exception {
         System.out.println("Display name : " + categoryDescription.getDisplayName());
       }
     }
-    // [END dlp_list_root_categories]
+    // [END dlp_list_categories]
   }
 
   /** Retrieve infoTypes. */

dlp/snippets/snippets/src/main/java/com/example/dlp/RiskAnalysis.java

@@ -55,7 +55,7 @@ public class RiskAnalysis {
   private static void calculateNumericalStats(
       String projectId, String datasetId, String tableId, String columnName)
       throws Exception {
-    // [START dlp_numerical_stats_analysis]
+    // [START dlp_numerical_stats]
 
     /**
      * Calculate numerical statistics for a column in a BigQuery table using the DLP API.
@@ -128,13 +128,13 @@ private static void calculateNumericalStats(
     } catch (Exception e) {
       System.out.println("Error in numericalStatsAnalysis: " + e.getMessage());
     }
-    // [END dlp_numerical_stats_analysis]
+    // [END dlp_numerical_stats]
   }
 
   private static void calculateCategoricalStats(
       String projectId, String datasetId, String tableId, String columnName)
       throws Exception {
-    // [START dlp_categorical_stats_analysis]
+    // [START dlp_categorical_stats]
     /**
      * Calculate categorical statistics for a column in a BigQuery table using the DLP API.
      * @param projectId The Google Cloud Platform project ID to run the API call under.
@@ -206,7 +206,7 @@ private static void calculateCategoricalStats(
     } catch (Exception e) {
       System.out.println("Error in categoricalStatsAnalysis: " + e.getMessage());
     }
-    // [END dlp_categorical_stats_analysis]
+    // [END dlp_categorical_stats]
   }
 
   private static void calculateKAnonymity(