rework dns api to take domainObject

the DNS backends require many different params, it's just easier to
pass them all together and have backends do whatever.

For example, route53 API requires the fqdn. Some other backends require just the
"part" to insert.

* location - location in the database (where app is installed)
* zoneName - the dns zone name
* domain - domain in the database (where apps are installed into)
* name/getName() - this returns the name to insert in the DNS based on zoneName/location
* fqdn - the fully resolved location in zoneName

verifyDnsConfig also takes a domain object even if it's not in db just so that we can
test even existing domain objects, if required. The IP param is removed since it's not
required.

for caas, we also don't need the fqdn hack in dnsConfig anymore

src/dns/noop.js

@@ -4,7 +4,7 @@ exports = module.exports = {
     upsert: upsert,
     get: get,
     del: del,
-    waitForDns: waitForDns,
+    wait: wait,
     verifyDnsConfig: verifyDnsConfig
 };
 
@@ -12,33 +12,30 @@ var assert = require('assert'),
     debug = require('debug')('box:dns/noop'),
     util = require('util');
 
-function upsert(dnsConfig, zoneName, subdomain, type, values, callback) {
-    assert.strictEqual(typeof dnsConfig, 'object');
-    assert.strictEqual(typeof zoneName, 'string');
-    assert.strictEqual(typeof subdomain, 'string');
+function upsert(domainObject, location, type, values, callback) {
+    assert.strictEqual(typeof domainObject, 'object');
+    assert.strictEqual(typeof location, 'string');
     assert.strictEqual(typeof type, 'string');
     assert(util.isArray(values));
     assert.strictEqual(typeof callback, 'function');
 
-    debug('upsert: %s for zone %s of type %s with values %j', subdomain, zoneName, type, values);
+    debug('upsert: %s for zone %s of type %s with values %j', location, domainObject.zoneName, type, values);
 
     return callback(null);
 }
 
-function get(dnsConfig, zoneName, subdomain, type, callback) {
-    assert.strictEqual(typeof dnsConfig, 'object');
-    assert.strictEqual(typeof zoneName, 'string');
-    assert.strictEqual(typeof subdomain, 'string');
+function get(domainObject, location, type, callback) {
+    assert.strictEqual(typeof domainObject, 'object');
+    assert.strictEqual(typeof location, 'string');
     assert.strictEqual(typeof type, 'string');
     assert.strictEqual(typeof callback, 'function');
 
     callback(null, [ ]); // returning ip confuses apptask into thinking the entry already exists
 }
 
-function del(dnsConfig, zoneName, subdomain, type, values, callback) {
-    assert.strictEqual(typeof dnsConfig, 'object');
-    assert.strictEqual(typeof zoneName, 'string');
-    assert.strictEqual(typeof subdomain, 'string');
+function del(domainObject, location, type, values, callback) {
+    assert.strictEqual(typeof domainObject, 'object');
+    assert.strictEqual(typeof location, 'string');
     assert.strictEqual(typeof type, 'string');
     assert(util.isArray(values));
     assert.strictEqual(typeof callback, 'function');
@@ -46,9 +43,9 @@ function del(dnsConfig, zoneName, subdomain, type, values, callback) {
     return callback();
 }
 
-function waitForDns(domain, zoneName, type, value, options, callback) {
-    assert.strictEqual(typeof domain, 'string');
-    assert.strictEqual(typeof zoneName, 'string');
+function wait(domainObject, location, type, value, options, callback) {
+    assert.strictEqual(typeof domainObject, 'object');
+    assert.strictEqual(typeof location, 'string');
     assert.strictEqual(typeof type, 'string');
     assert.strictEqual(typeof value, 'string');
     assert(options && typeof options === 'object'); // { interval: 5000, times: 50000 }
@@ -57,11 +54,8 @@ function waitForDns(domain, zoneName, type, value, options, callback) {
     callback();
 }
 
-function verifyDnsConfig(dnsConfig, domain, zoneName, ip, callback) {
-    assert.strictEqual(typeof dnsConfig, 'object');
-    assert.strictEqual(typeof domain, 'string');
-    assert.strictEqual(typeof zoneName, 'string');
-    assert.strictEqual(typeof ip, 'string');
+function verifyDnsConfig(domainObject, callback) {
+    assert.strictEqual(typeof domainObject, 'object');
     assert.strictEqual(typeof callback, 'function');
 
     return callback(null, { });