Update spark1x.properties

Author: khud

conf/spark1x.properties

@@ -5,4 +5,5 @@ plugins=com.github.khud.sparklin.kshell.plugins.LoadFilePlugin, \
   com.github.khud.sparklin.spark1x.Spark1xPlugin, \
   com.github.khud.sparklin.hdfsbrowser.HdfsBrowserPlugin, \
   com.github.khud.sparklin.kshell.plugins.SyntaxPlugin, \
-  com.github.khud.sparklin.kshell.plugins.PromptPlugin
+  com.github.khud.sparklin.kshell.plugins.PromptPlugin, \
+  com.github.khud.sparklin.kshell.plugins.ConfigPlugin