Fix namespaces and optimize imports (#1651)

* Fix namespaces and optimize imports

* Cleanup fixes

* Merge conflict fixes

* Merge conflict fixes

* Merge conflict fixes

Content.Tests/Shared/BodyTemplateTest.cs

@@ -1,10 +1,8 @@
-
-using Content.Server.BodySystem;
-using Content.Shared.BodySystem;
+using System.Collections.Generic;
+using Content.Server.Health.BodySystem.BodyTemplate;
+using Content.Shared.Health.BodySystem;
 using NUnit.Framework;
 using Robust.UnitTesting;
-using System;
-using System.Collections.Generic;
 
 namespace Content.Tests.Shared
 {

Content.Tests/Shared/Chemistry/ReagentUnit_Tests.cs

@@ -1,6 +1,6 @@
-using Content.Shared.Chemistry;
+using System;
+using Content.Shared.Chemistry;
 using NUnit.Framework;
-using System;
 
 namespace Content.Tests.Shared.Chemistry
 {

Content.Tests/Shared/Gamestates/ComponentStateNullTest.cs

@@ -8,7 +8,7 @@ using Robust.Shared.Interfaces.GameObjects;
 using Robust.Shared.Interfaces.Reflection;
 using Robust.Shared.Reflection;
 
-namespace Content.Tests.Shared.GameStates
+namespace Content.Tests.Shared.Gamestates
 {
     [TestFixture]
     public class ComponentStateNullTest