APNS expects expiration time to be in seconds, not MS.

[0x18B2EE]

parse-server expresses epoch time in milliseconds, while APNS expects it to be in seconds.
This causes parse-server (when correctly configured to send to APNS) to crash when the following cloud code is executed:

Parse.Cloud.define("testPush", function(request, response) {
    var query = new Parse.Query(Parse.Installation);
    query.equalTo( <query...> );

    var today = new Date();
    var timeout = new Date(today.getFullYear(), today.getMonth(), today.getDay() + 1);

    Parse.Push.send({
        where: query,
        expiration_time: timeout,
        data: {alert: "push hello"},
    }, {
        useMasterKey: true,
        success: response.success,
        error: response.error,
    });
});

with the error:

verbose: sending push to 69 installations
verb parse-server-push-adapter APNS APNS Connection 0 Connected
verb parse-server-push-adapter APNS APNS Connection 1 Connected
/parse-server/node_modules/parse-server/lib/ParseServer.js:333
            throw err;
            ^

TypeError: value is out of bounds
    at checkInt (buffer.js:971:11)
    at Buffer.writeUInt32BE (buffer.js:1064:5)
    at Connection.transmitNotification (/parse-server/node_modules/apn/lib/connection.js:691:8)
    at Connection.serviceBuffer (/parse-server/node_modules/apn/lib/connection.js:330:13)
    at Connection.<anonymous> (/parse-server/node_modules/apn/lib/connection.js:287:8)
    at Promise.apply (/parse-server/node_modules/q/q.js:1165:26)
    at Promise.promise.promiseDispatch (/parse-server/node_modules/q/q.js:788:41)
    at /parse-server/node_modules/q/q.js:1391:14
    at runSingle (/parse-server/node_modules/q/q.js:137:13)
    at flush (/Users parse-server/node_modules/q/q.js:125:13)

npm ERR! Darwin 15.4.0
npm ERR! argv "/usr/local/Cellar/node/5.10.0/bin/node" "/usr/local/bin/npm" "start"
npm ERR! node v5.10.0
npm ERR! npm  v3.8.3
npm ERR! code ELIFECYCLE
npm ERR! parse-server@0.1.0 start: `node index.js`
npm ERR! Exit status 7
npm ERR! 
npm ERR! Failed at the parse-server@0.1.0 start script 'node index.js'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the parse-server package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     node index.js
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs parse-server
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!     npm owner ls parse-server
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /parse-server/npm-debug.log

This patch converts the time sent to APNS from MS to seconds.

[codecov-io]

Current coverage is 87.02%

Merging #14 into master will not affect coverage as of 14fe7b8

@@            master     #14   diff @@
======================================
  Files            5       5       
  Stmts          239     239       
  Branches        38      38       
  Methods          0       0       
======================================
  Hit            208     208       
  Partial          1       1       
  Missed          30      30       

Review entire Coverage Diff as of 14fe7b8

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[flovilmart]

Very nice! Thanks!