This patch fixes the RAPI QA tests to work with today's RAPI code and
also does some other minor improvements:
  - QA: only create the cluster if so configured (‘create-cluster’ key),
    this allows running parts of the QA suite against existing clusters
  - export the “hvparams” for instances in RAPI

Reviewed-by: imsnah

It didn't work as planned because some commands depend on the return
value or output of some operations.

Reviewed-by: iustinp

The cluster no longer keeps individual host's SSH key, but rather
aliases all of them to the cluster name.

Reviewed-by: ultrotter

To my knowledge they're used nowhere and it's at least slightly
confusing to people adding new QA checks.

Reviewed-by: ultrotter

Reviewed-by: imsnah

- Failover back to original node in instance failure test
- Exclude secondary node from list of potential nodes in
  replace-disks test

Reviewed-by: iustinp

Reviewed-by: ultrotter

Reviewed-by: iustinp

qa_node.py: Fix typo in message
cmdlib.py: Don't add readded node to node list
ganeti-qa.py: Make sure readd isn't done for master node

Reviewed-by: iustinp

This allows us to readd a node after it failed and required a
reinstallation or replacement.

Reviewed-by: iustinp

Reviewed-by: iustinp

This patch removes the options that allow to create local_raid1 or
remote_raid1 instances. It also modifies the documentation and removes
these disk templates from burnin and from qa.

Reviewed-by: imsnah

Reviewed-by: imsnah

Reviewed-by: iustinp

This patch adds QA tests for most of the possible parameters in the
instance modify operation (exception being the MAC), and modifies the
sample QA file to run this test.

It also tests the no-modification test, but that is a weak one: we only
test that the exit code is one, not that the command gave a proper
response ("... please give at least one parameter") as opposed to a
traceback.

Reviewed-by: imsnah

- When line wrapping is needed, move spaces to the next line.
- Remove embedded line breaks from error messages.

Reviewed-by: schreiberal

Reviewed-by: schreiberal

Reviewed-by: iustinp

Reviewed-by: schreiberal

Reviewed-by: schreiberal

Reviewed-by: schreiberal

Also check whether file contents are correct for both “gnt-cluster command” and
“gnt-cluster copyfile”.

Reviewed-by: iustinp

- Split main() function into several small ones.
- Current work on disk failure tests. This is not yet finished.
- Fix small typo in qa_node.py.

Reviewed-by: schreiberal

Testing failure on the primary node is currently disabled due to drbd problems.

Reviewed-by: iustinp

Reviewed-by: iustinp

Reviewed-by: schreiberal

- Implement colours in qa_utils.
- Print warning for cron script.

Reviewed-by: iustinp

Added tests:
- “gnt-cluster getmaster”
- “gnt-cluster version”
- “gnt-instance list”
- “gnt-instance reinstall”

Reviewed-by: schreiberal

- Test “gnt-backup export” and “gnt-backup import”.
- Move “ResolveInstanceName” to qa_utils.py.
- Fix tests for “ganeti-watcher”.
- Make instance shutdown and startup configurable.

Reviewed-by: schreiberal

Reviewed-by: iustinp

Reviewed-by: iustin

Reviewed-by: iustinp

Reviewed-by: iustinp

Reviewed-by: iustinp

Reviewed-by: iustinp

- Run “gnt-cluster verify” and “gnt-cluster info” after adding all nodes
- Remove unused --cleanup option
- Remove --verbose option and always print executed SSH commands

Reviewed-by: iustinp

This changes the raising of exceptions from:
  raise Exception, value
to
  raise Exception(value)

as the first form will be removed in python-3000 and the second form is
preferred now.

The changes also involve a few cases of changing from raising standard
exceptions and use our own ones.

The new version also fixes many pylint-generated warnings, especially in
ganeti-noded where I changed many methods to @staticmethod.

There is no functionality changed (barring any bugs).

- Split up info tests and add more of them
- Replace map() by [x for x in y]

Reviewed-by: iustinp

Reviewed-by: iustinp