OC-5896: Recording of Notes & Discrepancies Date Created, Date Updated

    Inconsistencies in date/time representation in OpenClinica UI
    Recording of Notes & Discrepancies Date Created, Date Updated

I added timestamp w/time zone to date_created field in discrepancy_note table and placed it in liquibase. The timezone issue should be resolved.
To do this, I have to drop all Views associated with discrepancy note before implementing timestamp field. After that , I re-created the Views .
I also updated couple views to acomodate Date field calculation

date_update d(Not Applicable in Discrepancy Notes) 
DATE_PART('day',current_timestamp - totals.date_updated) replaced 'now'::text::date - totals.date_updated because the column's data type changed. To test me & @jkeremian did the following query:

# This was run on an example database with date_created = 2013-12-04 and now is/was 2014-09-02. Result was: 272
select 'now'::text::date - date_created from discrepancy_note where discrepancy_note_id=1

# This was run on an example database with audit_date = 2013-12-04 09:13:00.021-05 and now is/was 2014-09-02 16:03:00-05. Result was: 272
select DATE_PART('day',current_timestamp - audit_log_event.audit_date) from audit_log_event where audit_id = 34 

Results were identical