Name the `IDataExporter` local variable `dataExporter`, not `dataImporter`.
Scope exporter registration failures to failing to register that exporter.
Add error handling for importer, deleter, and upgrader registration.

Parallels that introduced for exporter registration.
Normalize data exporter registration whitespace and exception message.

Match that adopted for importer, upgrader, and deleter.
Trivial: name IDataDeleter instance dataDeleter not dataImporter.
Fix log message placeholder format: () --> {}.
Ignore `JpaClusterLockDaoTest`s that involve sleeping.
Remove unused getters for Marketplace Service and Portlet controller properties.
UP-4009:  Respondr: Customize drawer displays in focus/maximized mode
MUMUP-237: Removed unique constraint from up_aggr_portlet_mapping.portlet_name
Merge pull request #314 from apetro/remove_unused_marketplace_getters

Remove unused getters in Marketplace Service and Portlet
Merge pull request #303 from apetro/clean_ignore_more_jpaclusterlockdaotests

Ignore `JpaClusterLockDaoTest`s that involve sleeping.
Merge pull request #315 from timlevett/remove_unwanted_contraint_on_portlet_name

Remove unique constraint from up_aggr_portlet_mapping.portlet_name .
Merge pull request #281 from apetro/jaxb_exporter_null_handling

UP-4093 : Contain JAXB Importer, Exporter, Deleter, and Upgrader provisioning failures.
Added in notice and license headers