Update 20_setupextrasvars.rake for Build object

This commit updates the loading of extras vars in lieu of the new build
object architecture. This allows us to read in data from the extras
files as needed without worrying if specific parameters are defined or
not. The currently 'overrideable' params are still kept as such to make
sure we can still override as necessary.

Signed-off-by: Moses Mendoza <moses@puppetlabs.com>
Replace instance vars with build.<attr>

This commit replaces instance variable evaluations throughout the tasks
with accessor calls to the build object.
Remove environment variable passing to remote tasks

This commit adds a utility method to send the build parameters to a
remote host and return the path on the remote filesystem as a string.
This method is then used in the remote tasks to determine various
parameters required for the build. This gets us out of the business of
passing along environment variables to the remote tasks, a source of
much pain as the remote tasks have become more complex.

Signed-off-by: Moses Mendoza <moses@puppetlabs.com>
Add DEBUG printing of all variables

This commit adds a debug parameter to the build object that we use initially to
print out all variables if passed. This can be used later as a flag for other
such behaviors as we chose.
Set instance variables for backwards compatibility
Make @name = @project for backwards compatibility

This commit also adds some more comments to 10_setupvars.rake, and tries to
standardize some formatting around comments.
Enable output dir for params write, add tasks to wrap

This commit adds tasks for printing and writing all build parameters. This
enables us to leverage this file for great purposes, such as passing into a
queuing system for builds. Printing is nice for debug.

Signed-off-by: Moses Mendoza <moses@puppetlabs.com>
Remove unused variables in pe sles build

We moved this data into the build-data, which means we no longer need it
defined here. We're not using it and it has no value.

Signed-off-by: Moses Mendoza <moses@puppetlabs.com>