Fixes #2885 duplicate sessions (#4143)

* Adds test to repro the issue

* Improved test

* Destroy duplicate sessions for User/Installation-id pair

- Sessions will also be created with action login instead of signup when using 3rd party auth

spec/ParseUser.spec.js

@@ -1168,6 +1168,36 @@ describe('Parse.User testing', () => {
     });
   });
 
+  it('only creates a single session for an installation / user pair (#2885)', done => {
+    Parse.Object.disableSingleInstance();
+    const provider = getMockFacebookProvider();
+    Parse.User._registerAuthenticationProvider(provider);
+    Parse.User.logInWith('facebook', {
+      success: () => {
+        return Parse.User.logInWith('facebook', {
+          success: () => {
+            return Parse.User.logInWith('facebook', {
+              success: (user) => {
+                const sessionToken = user.getSessionToken();
+                const query = new Parse.Query('_Session');
+                return query.find({ useMasterKey: true })
+                  .then((results) => {
+                    expect(results.length).toBe(1);
+                    expect(results[0].get('sessionToken')).toBe(sessionToken);
+                    expect(results[0].get('createdWith')).toEqual({
+                      action: 'login',
+                      authProvider: 'facebook'
+                    });
+                    done();
+                  }).catch(done.fail);
+              }
+            });
+          }
+        });
+      }
+    });
+  });
+
   it('log in with provider with files', done => {
     const provider = getMockFacebookProvider();
     Parse.User._registerAuthenticationProvider(provider);