Merge pull request #22 from thehyve/london_hackathon

Clean RWG solr schema from unprovided fields
removed an SQL clause, specifially 'coalesce(SOLR_HIERARCHY,'') as SOLR_HIERARCHY', from the first query in the file data-config_rwg.xml.php. It was causing the query to fail; an alternative needs to be found. See TMART-183 for details.
TMART-184: Updated PostgreSQL i2b2_load_clinical_data function to use round(a.data_value::numeric) instead of a.data_value::integer to typecast values which might be float format.
TMART-151: Added calls to substr function for databaseName parameter to cz_write_audit function/procedure so that values greater than 50 characters in length are truncated.
Merge remote-tracking branch 'transmart/london_hackathon' into london_hackathon
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