Handle Exceptions in the catch block Method

Its not a good practice to always leave the catch block empty, we need to either include a boolean value if its a boolean method or handle exceptions correctively in this class

https://github.com/openmrs/openmrs-distro-referenceapplication/blob/master/ui-tests/src/test/java/org/openmrs/reference/page/PatientCaptureVitalsPage.java