added error chart on tree

Signed-off-by: MwangiKevin <mwangikevinn@gmail.com>
made a correction on procedure error_charts_data
Procedures Complete
created procedure equipment_tests_data

Signed-off-by: MwangiKevin <mwangikevinn@gmail.com>
Merge remote-tracking branch 'shohiek/feature/db_procedures' into feature/db_procedures
Merge branch 'feature/data_corrections' into develop
Merge branch 'feature/db_procedures' into develop

Conflicts:
	application/modules/charts/models/equipment_model.php
Merge branch 'feature/drilldown' into develop