Fix incorrect redirection when staging SSH files.

Existing code uses sudo and cat with redirection to stage SSH files
(e.g. id_rsa). But the redirection redirects the output of the sudo
command as well as the cat command. Thus, any stdout from the
interactive shell (e.g. .bashrc) can end up in the staged files.
Remove the redirection and use dd instead (as is used to copy
staged files to their final destination).

Closes-Bug: #1266557
Change-Id: Ia976bc309a282e4917e89afca52b6986bab26f07
Fix error installing language pack in Guest Image

    A script in the element for ubuntu-guest does not appear to be
    running the apt-get update command.  02-baseline-tools had a
    package which no longer matches the default name which is part of
    the base image.  I removed the apt-get update which was not working
    and deferred to the call in 03-baseline-tools.  I then moved our
    02-baseline-tools to 04-baseline-tools so that it runs after 03

Change-Id: I1a9ad225f9a2e0fa976be02180dbbe5e24c3bdea
Merge "Fix incorrect redirection when staging SSH files."
Initial support for single instance Cassandra Database

Reasons
- this code adds ability to create/delete instance
with mongodb service type. No other operations supported.
- trove should support multiple extensions. One of the is NoSQL support.
Main goal is to add support for Apache Cassandra NoSQL database.

Changes:
- this code adds ability to create/delete instance
with cassandra service type. No other operations supported;
- adding datastore/version registration for cassandra

Change-Id: I67733f0ba18aae513465d66bb48e44bbb316a575
Implements: blueprint cassandra-db-support