package-app should default fs.default.name and mapred.job.tracker to injected Oozie properties

Currently when using the defaults of the "package-app" goal, the Maven plugin requires that hadoopConfiguration for "mapred.job.tracker" and "fs.default.name" be specified. This manifest as the following exception:

[ERROR] Failed to execute goal org.kitesdk:kite-maven-plugin:0.10.1:package-app (default-cli) on project foo-project: Missing property 'fs.default.name' in hadoopConfiguration -> [Help 1]

If those values were defaulted to the Oozie properties of

${jobTracker}
${nameNode}

It would eliminate the hidden goal configuration requirement.