[ONOS-7340]: Add 'Last Updated' Date to All TestON Result Wiki Graphs

Change-Id: I73f49a8b9a8c1e255aab7ac74d017b3b74bd29eb
diff --git a/TestON/JenkinsFile/scripts/SCPFscaleTopo.R b/TestON/JenkinsFile/scripts/SCPFscaleTopo.R
index e69a383..f6da0d2 100644
--- a/TestON/JenkinsFile/scripts/SCPFscaleTopo.R
+++ b/TestON/JenkinsFile/scripts/SCPFscaleTopo.R
@@ -208,7 +208,10 @@
                 legend.position = "bottom",
                 legend.text = element_text( size=22 ),
                 legend.title = element_blank(),
-                legend.key.size = unit( 1.5, 'lines' ) )
+                legend.key.size = unit( 1.5, 'lines' ),
+                plot.subtitle = element_text( size=16, hjust=1.0 ) )
+
+subtitle <- paste( "Last Updated: ", format( Sys.time(), format = "%b %d, %Y at %I:%M %p %Z" ), sep="" )
 
 values <- geom_text( aes( x = dataFrame$iterative,
                           y = sum + 0.02 * max( sum ),
@@ -220,7 +223,7 @@
 
 wrapLegend <- guides( fill = guide_legend( nrow=2, byrow=TRUE ) )
 
-title <- ggtitle( chartTitle, "" )
+title <- labs( title = chartTitle, subtitle = subtitle )
 
 # Store plot configurations as 1 variable
 fundamentalGraphData <- mainPlot +