Schema compare cancel operation (#826)

* First cut of schema compare cancel (private nuget)

* Update Dacfx nuget to a published version

src/Microsoft.SqlTools.ServiceLayer/Localization/sr.cs

@@ -2941,6 +2941,14 @@ namespace Microsoft.SqlTools.ServiceLayer
             }
         }
 
+        public static string SchemaCompareSessionNotFound
+        {
+            get
+            {
+                return Keys.GetString(Keys.SchemaCompareSessionNotFound);
+            }
+        }
+
         public static string ConnectionServiceListDbErrorNotConnected(string uri)
         {
             return Keys.GetString(Keys.ConnectionServiceListDbErrorNotConnected, uri);
@@ -4281,6 +4289,9 @@ namespace Microsoft.SqlTools.ServiceLayer
             public const string OpenScmpConnectionBasedModelParsingError = "OpenScmpConnectionBasedModelParsingError";
 
 
+            public const string SchemaCompareSessionNotFound = "SchemaCompareSessionNotFound";
+
+
             private Keys()
             { }
 

src/Microsoft.SqlTools.ServiceLayer/Localization/sr.resx

@@ -1723,4 +1723,7 @@
     <value>Error encountered while trying to parse connection information for endpoint '{0}' with error message '{1}'</value>
     <comment></comment>
   </data>
+  <data name="SchemaCompareSessionNotFound" xml:space="preserve">
+    <value>Could not find the schema compare session to cancel</value>
+  </data>
 </root>

src/Microsoft.SqlTools.ServiceLayer/Localization/sr.strings

@@ -797,4 +797,5 @@ ExtractInvalidVersion = Invalid version '{0}' passed. Version must be in the for
 # Schema Compare
 PublishChangesTaskName = Apply schema compare changes
 SchemaCompareExcludeIncludeNodeNotFound = Failed to find the specified change in the model
-OpenScmpConnectionBasedModelParsingError = Error encountered while trying to parse connection information for endpoint '{0}' with error message '{1}'
+OpenScmpConnectionBasedModelParsingError = Error encountered while trying to parse connection information for endpoint '{0}' with error message '{1}'
+SchemaCompareSessionNotFound =  Could not find the schema compare session to cancel

src/Microsoft.SqlTools.ServiceLayer/Localization/sr.xlf

@@ -2001,6 +2001,11 @@
         <target state="new">Error encountered while trying to parse connection information for endpoint '{0}' with error message '{1}'</target>
         <note></note>
       </trans-unit>
+      <trans-unit id="SchemaCompareSessionNotFound">
+        <source>Could not find the schema compare session to cancel</source>
+        <target state="new">Could not find the schema compare session to cancel</target>
+        <note></note>
+      </trans-unit>
     </body>
   </file>
 </xliff>