Polishing.

Reintroduce public compile-time constants but flag them deprecated with replacement hint.

Original Pull Request: #2158

Author: christophstrobl

src/main/java/org/springframework/data/redis/core/convert/MappingRedisConverter.java

@@ -1223,6 +1223,12 @@ public static class KeyspaceIdentifier {
 		public static final String DELIMITER = ":";
 		public static final String PHANTOM_SUFFIX = DELIMITER + PHANTOM;
 
+		/**
+		 * @deprecated since 2.6. Please use {@link #DELIMITER} instead.
+		 */
+		@Deprecated(/* since="2.6" */)
+		public static final String DELIMITTER = DELIMITER;
+
 		private final String keyspace;
 		private final String id;
 		private final boolean phantomKey;
@@ -1303,6 +1309,12 @@ public static class BinaryKeyspaceIdentifier {
 		public static final byte DELIMITER = ':';
 		public static final byte[] PHANTOM_SUFFIX = ByteUtils.concat(new byte[] { DELIMITER }, PHANTOM);
 
+		/**
+		 * @deprecated since 2.6. Please use {@link #DELIMITER} instead.
+		 */
+		@Deprecated(/* since="2.6" */)
+		public static final byte DELIMITTER = DELIMITER;
+
 		private final byte[] keyspace;
 		private final byte[] id;
 		private final boolean phantomKey;