Don't install novnc from package by default

By default the installation is failed because the novnc package has got
the a dependency of the nova-common package. The last package provides
"/etc/nova/*" files with appropriate privileges. It potentially brings
to the problem of an access to those files.

Change-Id: I1689bef817365b10bf972dc4a8033892ad5939d1
Related-Bug: 1248923
Fix typo in config section name in README.md

s/locarc/localrc/

Change-Id: Ia5cdfa8e6995e5cad80750372faa35927d4d8e48
Use vmdk descriptor to populate image properties

image_upload.sh doesn't use the descriptor properties embedded inside
the vmdk file. This requires the user to manually change the filename of the
vmdk file to add the properties (disk type, storage adapter and network
adapter).
In case of a sparse monolithic sparse or stream-optimized sparse, these
properties are extracted from the descriptor.
The user can still override these values by modifying the filename.

Change-Id: I1734311c66efe60a1a30e3ea63cc2a9da9cdb5b4
Closes-Bug: #1247300
Use the oslo db database connection for Heat

This is the preferred configuration now, and sql_connection is
deprecated.

Change-Id: I2d8342b5025ab481e1db0521a3e0610b73bda9de
Merge "Use the oslo db database connection for Heat"
Merge "Use vmdk descriptor to populate image properties"
Merge "Fix typo in config section name in README.md"
Merge "Don't install novnc from package by default"