Merge pull request #1 from fsteeg/exec

Add default path for exec to run with puppet 2.7.19, fix typo
Create reasonable default path for namenode format

this exec task returns non-zero and causes puppet to fail. It seems this script may depend on something within the path; so, this fixes that.
Merge pull request #5 from blazindrop/master

Exec task should use a default path
Update for usage with Hadoop 2.3.0

- update default config files location in distribution archive
- replace included distribution with wget command in a README