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 here too...