tool_uploadcourse doesn't support multiple enrolment instances of the same type

During this test, you will assess that you can use the name of an enrolment method to update an existing one, and that when the name is not passed, the first instance of the type is updated, if it exists

1. Create a combination of CSV files similar to the one below

   shortname,fullname,category,enrolment_1,enrolment_1_name,enrolment_1_customint1

   CSV0,CSV0,1,cohort,,999

   CSV1,CSV1,1,cohort,"Cohort instance",1

   CSV2,CSV2,1,cohort,"Second cohort instance",2

   CSV3,CSV3,1,manual,"Manual instance",1

2. Go to the tool to upload courses via CSV and upload your CSV, make sure that
   • You cannot duplicate the manual enrolment method if you specify a name for it
   • You can create as many enrolment methods as you like by using a different name
   • You can update existing methods when you specify their name (use customint1 to check if it's updated)
   • When not passing a name, the first enrolment method matching the type is updated (use customint1 to check if it's updated)
   • You can specify a custom name for the manual enrolment method, but first you need to remove the method it from the course
3. This should apply to both existing and new courses