GUI-1153: Set initial IP count to 1 in Allocate IP Addresses dialog on Elastic IP landing page.  Remove initial disabled button state and code that's no longer needed.
Merge branch 'develop' into GUI-1153

Conflicts:
	eucaconsole/static/js/pages/ipaddresses.js
Merge pull request #840 from eucalyptus/GUI-1153

GUI-1153: Set initial IP count to 1 in Allocate IP Addresses dialog on Elastic IP landing page