* does a mysqldump of hilis4/genomics/uclh/etc database and anonymises the patients + patient_case tables
* excludes some tables with patient info (eg patient_demographics)
* generates a temporary db so required partition space will depend on size of uncompressed source db data dump (HILIS4 around 1GB) 
* outreach & hmrn dbs can be directly exported via mysqldump as they have no patient data - patient_id is FK to hilis4.patients.id
* usage: sh dump_and_anonymise_db.sh <cloned_db_to_anonymise> <db username> <db password>
