Schema Compare open scmp file (#6118)

* can compare scmp with databases

* show error if can't connect to db

* excludes now work

* fixes after rebase and other small fixes

* Addressing comments

* fixes after rebasing

* fix excludes not always being remembered correctly

* fix switched check

* addressing comments

extensions/schema-compare/src/test/schemaCompare.test.ts

@@ -38,7 +38,8 @@ const mockSourceEndpoint: azdata.SchemaCompareEndpointInfo = {
 	serverName: '',
 	databaseName: '',
 	ownerUri: '',
-	packageFilePath: mocksource
+	packageFilePath: mocksource,
+	connectionDetails: undefined
 };
 
 const mockTargetEndpoint: azdata.SchemaCompareEndpointInfo = {
@@ -47,7 +48,8 @@ const mockTargetEndpoint: azdata.SchemaCompareEndpointInfo = {
 	serverName: '',
 	databaseName: '',
 	ownerUri: '',
-	packageFilePath: mocktarget
+	packageFilePath: mocktarget,
+	connectionDetails: undefined
 };
 
 describe('SchemaCompareDialog.openDialog', function (): void {