let tests pass in all environments

the `.invalid` domain name is a special, reserved domain name best
suitable for testing purposes, as it happens that some clients
have something running on some domains or are routed somewhere.

list of reserved domain names:
http://www.iana.org/assignments/special-use-domain-names/special-use-domain-names.xhtml

reference:
http://tools.ietf.org/html/rfc6761

PR: #20
PR-URL: #20
Reviewed-By: garren smith <garren.smith@gmail.com>

test/activetasks.js

@@ -132,7 +132,7 @@ describe('activetasks', () => {
 
     it('returns error for bad connections', () => {
 
-      return getActiveTask('http://127.1.1.10')
+      return getActiveTask('http://doesnotexist.invalid')
       .catch(err => {
         assert.ok(/Could not connect/.test(err.message));
       });

test/couch-config.js

@@ -74,9 +74,9 @@ describe('couch-config', () => {
 
     it('getConfig throws error on bad url', () => {
       return getConfig('node1', 'bad-url')
-      .catch(err => {
-        assert.ok(/not a valid url/.test(err.message));
-      });
+        .catch(err => {
+          assert.ok(/not a valid url/.test(err.message));
+        });
     });
 
     it('getConfig throws error on invalid protocol', () => {
@@ -87,7 +87,7 @@ describe('couch-config', () => {
     });
 
     it('gets config bad url returns false', () => {
-      return getConfig('node1', 'http://127.0.0.2/')
+      return getConfig('node1', 'http://badurl.invalid')
         .catch(err => {
           assert.ok(/Could not find node/.test(err.message));
         });