Merge pull request #2186 from TheFireCookie/2.x

Add Percent metric in OperatingSystemStats

Author: gmarz

src/Nest/Cluster/NodesStats/NodeStats.cs

@@ -87,6 +87,8 @@ public class OperatingSystemStats
 		public long Timestamp { get; internal set; }
 		[JsonProperty("load_average")]
 		public float LoadAverage { get; internal set; }
+		[JsonProperty("cpu_percent")]
+		public int CpuPercent { get; internal set; }
 
 		[JsonProperty("mem")]
 		public ExtendedMemoryStats Memory { get; internal set; }

src/Tests/Cluster/NodesStats/NodesStatsApiTests.cs

@@ -99,6 +99,7 @@ protected void Assert(OperatingSystemStats os)
 
 			os.Timestamp.Should().BeGreaterThan(0);
 			os.LoadAverage.Should().NotBe(0);
+			os.CpuPercent.Should().NotBe(0);
 
 			os.Memory.Should().NotBeNull();
 			os.Memory.TotalInBytes.Should().BeGreaterThan(0);