fix getEncryptedObj test

getEncryptedObj doesn't even exist any more. I remove the test for that function, and add a test for the new function, export, which replaces it. These tests are for mocha in the browser, which can be run by building Copay and then opening test/index.html in your browser. The tests should be run both in Chrome and Firefox.

Please someone review this, and follow the new rule: You must download my fork, run the tests and confirm that they pass before giving your "ACK" to this PR. The way you can get my fork is to add my repo as remote, if you haven't already: <code>git remote add ryanxcharles git@github.com:ryanxcharles/copay.git</code>