#138 Default time value setting for panel headers

[Harsha Ramakrishnappa]

Need to have default value specification in tutorial script for panel headers.

<panelHeaders refreshEnabled="true" showRefreshControl="true">
<time>2</time>
<autoRefreshControls>
<timeOptions>[1,2,3,4,5,7,10]</timeOptions>
</autoRefreshControls>
</panelHeaders>