Added basic property tests for matchersUtil.equals

* See #1764 from @dubzzz
* Property tests are only run in Node, not browser.
* The Travis build sets JASMINE_LONG_PROPERTY_TESTS to enable much more
  thorough (but slow) testing.

spec/support/jasmine-browser.js

@@ -15,7 +15,7 @@ module.exports = {
     '**/*.js'
   ],
   specDir: 'spec',
-  specFiles: ['**/*[Ss]pec.js', '!npmPackage/**/*'],
+  specFiles: ['**/*[Ss]pec.js', '!npmPackage/**/*', '!property/**/*'],
   helpers: [
     'helpers/asyncAwait.js',
     'helpers/BrowserFlags.js',