Fixing number of pods in report

In the rewrite of the report generation code, we regressed to
using the passed in requested number of pods rather than the
actual. Since we typically attempt to launch more pods than the
system is capable of, the math for the stats are done incorrectly
and misreported.

This changes the behavior back to using the correct value of the
total number of pods launched.

Author: dklyle

metrics/report/report_dockerfile/tidy_scaling.R

@@ -135,15 +135,16 @@ for (currentdir in resultdirs) {
 				cputotal = cputotal + cpuused
 			}
 
+			num_pods = local_bootdata$n_pods[length(local_bootdata$n_pods)]
 			# We get data in Kb, but want the graphs in Gb.
 			memtotal = memtotal / (1024*1024)
-			gb_per_pod = memtotal/fdata$Config$NUM_PODS
+			gb_per_pod = memtotal/num_pods
 			pod_per_gb = 1/gb_per_pod
 
 			# Memory usage stats.
 			local_mems = c(
 				"Test"=testname,
-				"n"=fdata$Config$NUM_PODS,
+				"n"=num_pods,
 				"Tot_Gb"=round(memtotal, 3),
 				"avg_Gb"=round(gb_per_pod, 4),
 				"n_per_Gb"=round(pod_per_gb, 2) 
@@ -153,16 +154,16 @@ for (currentdir in resultdirs) {
 			# cpu usage stats
 			local_cpus = c(
 				"Test"=testname,
-				"n"=fdata$Config$NUM_PODS,
+				"n"=num_pods,
 				"Tot_CPU"=round(cputotal, 3),
-				"avg_CPU"=round(cputotal/fdata$Config$NUM_PODS, 4)
+				"avg_CPU"=round(cputotal/num_pods, 4)
 			)
 			cpustats=rbind(cpustats, local_cpus)
 
 			# launch (boot) stats
 			local_boots = c(
 				"Test"=testname,
-				"n"=fdata$Config$NUM_PODS,
+				"n"=num_pods,
 				"median"=median(na.omit(local_bootdata)$launch_time)/1000,
 				"min"=min(na.omit(local_bootdata)$launch_time)/1000,
 				"max"=max(na.omit(local_bootdata)$launch_time)/1000,