Perf Test fixing bugs and Update command (#155)

* Fixed some bugs caused by rafactoring

* Verifying a test db is created before running the tests

test/Microsoft.SqlTools.ServiceLayer.PerfTests/project.json

@@ -1,14 +1,18 @@
 {
+  "name": "Microsoft.SqlTools.ServiceLayer.PerfTests",
   "version": "1.0.0-*",
-
+  "buildOptions": {
+    "debugType": "portable",
+    "emitEntryPoint": true
+  },
   "dependencies": {
-    "xunit":  "2.1.0",
+    "xunit": "2.1.0",
     "dotnet-test-xunit": "1.0.0-rc2-192208-24",
     "Microsoft.SqlTools.ServiceLayer": {
       "target": "project"
     },
-    "Microsoft.SqlTools.ServiceLayer.TestDriver": "1.0.0-*" 
-  }, 
+    "Microsoft.SqlTools.ServiceLayer.TestDriver": "1.0.0-*"
+  },
 
   "testRunner": "xunit",
 
@@ -16,14 +20,16 @@
     "netcoreapp1.0": {
       "dependencies": {
         "Microsoft.NETCore.App": {
-          "type": "platform",
-          "version" : "1.0.0"
-        } 
+          "version": "1.0.0"
+        }
       },
       "imports": [
         "dotnet5.4",
         "portable-net451+win8"
       ]
     }
+  },
+  "runtimes": {
+    "win7-x64": {}
   }
 }