Add convenience constructor to DefaultStringTuple.

Original Pull Request: #2097

Author: mp911de

src/main/java/org/springframework/data/redis/connection/DefaultStringTuple.java

@@ -40,6 +40,18 @@ public DefaultStringTuple(byte[] value, String valueAsString, Double score) {
 
 	}
 
+	/**
+	 * Constructs a new <code>DefaultStringTuple</code> instance.
+	 *
+	 * @param valueAsString
+	 * @param score
+	 * @since 2.6
+	 */
+	public DefaultStringTuple(String valueAsString, double score) {
+		super(valueAsString.getBytes(), score);
+		this.valueAsString = valueAsString;
+	}
+
 	/**
 	 * Constructs a new <code>DefaultStringTuple</code> instance.
 	 *