Moving Windows_NT perf jobs to machine pool with Windows Server 2016.

Author: José Rivero

perf.groovy

@@ -47,7 +47,7 @@ def static getOSGroup(def os) {
 
                 def newJob = job(Utilities.getFullJobName(project, jobName, isPR)) {
                     // Set the label.
-                    label('windows_clr_perf')
+                    label('windows_server_2016_clr_perf')
                     wrappers {
                         credentialsBinding {
                             string('BV_UPLOAD_SAS_TOKEN', 'CoreCLR Perf BenchView Sas')
@@ -172,7 +172,7 @@ def static getOSGroup(def os) {
 
             def newJob = job(Utilities.getFullJobName(project, "perf_throughput_perflab_${os}_${arch}", isPR)) {
                 // Set the label.
-                label('windows_clr_perf')
+                label('windows_server_2016_clr_perf')
                 wrappers {
                     credentialsBinding {
                         string('BV_UPLOAD_SAS_TOKEN', 'CoreCLR Perf BenchView Sas')