Fix PipelineReconciler namespace

[jogrogan]

An incorrect assumption was made that the yaml of each sub-resource inside the pipeline object will contain its own namespace information. While this can be true if the corresponding table/job template explicitly set their own namespace, in most cases the namespace is set automatically at resource creation time to be the same as the pipeline object.

• The explicit setting of namespaces will only ever be needed if deploying resources across namespaces, which isn't supported today anyway as this breaks the Kubernetes ownership model.

Also fix various checkstyle issues