Fixed /get_param service for arrays (RobotWebTools#776)

**Public API Changes**
None


**Description**
The missing comma resulted in a wrong mapping of array parameters. For example, requesting a string array only returned an empty value because the type was given as index 9 (entry 10) but the type_mapping only had 9 entries. 

The error should be obvious, so I have not included an extra test.

rosapi/src/rosapi/params.py

@@ -55,7 +55,8 @@
     "integer_value",
     "double_value",
     "string_value",
-    "byte_array_value" "bool_array_value",
+    "byte_array_value",
+    "bool_array_value",
     "integer_array_value",
     "double_array_value",
     "string_array_value",