Fix XML unit test
Add @Nullable/@Nonnull
Update pom.xml

Increase xMx to 1024M 
Update pom.xml

Configure PMD to ignore target/generated-sources
Update pom.xml

Remove PMD config
- Supports backslashes in CSV
- Work on OPAL-1691: Export fails for the Participants table
Merge branch 'dev-ced'
- Supports backslashes in CSV (OPAL-1691: Export fails for the Participants table)
- Fix FindBugs warnings
ES mappings (types and fields) renamed.
Variables are indexed (in the same ES index, but in distinct mappings).
OPAL-1706 Variables and values are indexed in different ES indices and with different schedule strategies
OPAL-1707 - entity type can now be defined by the user
- Upgrade step for backslashes support
OPAL-1706 Value sequence indexing fixed. Category indexing added.
Merge pull request #111 from kazoompa/feature-OPAL-1707

OPAL-1707 - entity type can now be defined by the user
Renamed type mapping name for dictionary index.
Corrected error reporting when importing data
Merge pull request #112 from kazoompa/feature-OPAL-1707

feature-OPAL-1707
Corrected error reporting when importing data
Corrected import