javadocs fixed

redisson/src/main/java/org/redisson/api/RKeys.java

@@ -144,7 +144,7 @@ public interface RKeys extends RKeysAsync {
     long touch(String... names);
     
     /**
-     * Checks if provided keys exist
+     * Returns amount of existing keys
      * 
      * @param names of keys
      * @return amount of existing keys

redisson/src/main/java/org/redisson/api/RObject.java

@@ -182,7 +182,7 @@ public interface RObject extends RObjectAsync {
 
     /**
      * Rename current object key to <code>newName</code>
-     * only if new key is not exists
+     * only if new key doesn't exist.
      *
      * @param newName - new name of object
      * @return <code>true</code> if object has been renamed successfully and <code>false</code> otherwise