Merge pull request #4283 from brettfo/jenkins-image

use dev15.5 for CI builds

netci.groovy

@@ -111,7 +111,7 @@ ${buildPath}build.cmd ${buildFlavor} ${build_args}""")
             // TODO: set to false after tests are fully enabled
             def skipIfNoTestFiles = true
 
-            def affinity = configuration == 'Release_net40_no_vs' ? 'latest-or-auto' : (os == 'Windows_NT' ? 'latest-or-auto-dev15-0' : 'latest-or-auto')
+            def affinity = configuration == 'Release_net40_no_vs' ? 'latest-or-auto' : (os == 'Windows_NT' ? 'latest-dev15-5' : 'latest-or-auto')
             Utilities.setMachineAffinity(newJob, os, affinity)
             Utilities.standardJobSetup(newJob, project, isPullRequest, "*/${branch}")