Release 3.0.0-rc3

Updated Modulefile for release 3.0.0-rc3

Change-Id: I880424118e845491db6af2d068970addbd65706a
Release 3.0.0

Updated modulefile for release 3.0.0

Change-Id: I13615881d12378d766dfb7726f4004ba18cbdd3f
Adds COMPRESS_OFFLINE option to local_settings

The Ubuntu Havana packages includes pre-compressed
assets and does not install a package that provides
lesscpy.

This re-adds COMPRESS_OFFLINE=True to utilize this
and avoid a broken Horizon install on Ubuntu.

Change-Id: I6671938a87744a4dd0b84021ca87cd49aea10741
Closes-Bug: #1272441