Fix creating test visit in UI tests

Currently UI tests fail due to RA-1217 i.e. login location must match visit location to be displayed on the active visits page.

We need to create a visit for a location selected during login in for example TestData.TestVisit(patient.uuid, VISIT_TYPE_UUID, LOCATION_UUID).create(); in XSSOnPhoneNumberFieldTest

Change it to TestData.TestVisit(patient.uuid, VISIT_TYPE_UUID).create();
Override create method in uitestframework to first get the login location uuid using REST endpoint: /ws/rest/v1/appui/session