1. A method for determining severity of execution test failures, the method comprising: identifying, by one or more computer processors, a test report log for a regression test; identifying, by one or more computer processors, one or more errors in the identified test report log; determining, by one or more computer processors, a severity category for the one or more identified errors in the identified test report log, wherein determining a severity category for the identified test report log comprises: identifying, by one or more computer processors, a previous test report log with similar errors to the identified one or more errors in the identified test report log; assigning, by one or more computer processors, a severity category assigned to the previous test report log to the identified test report log; identifying, by one or more computer processors, at least one preset error message that matches an error message included in the identified test report log and corresponds to a plurality of severity categories; and determining, by one or more computer processors, a severity category from plurality of severity categories that includes a most identical preset error message in relation to error messages in the identified test report log; wherein determining a severity category for the identified test report log, further comprises: determining, by one or more computer processors, a percentage completion that corresponds to the identified test report log based on the identified one or more errors; assigning, by one or more computer processors, a severity category, from a plurality of severity categories, to the identified test report log based on the determined percentage completion; identifying, by one or more computer processors, a number of user interfaces without proper accessibility; assigning, by one or more computer processors, a severity category, from a plurality of severity categories, to the identified test report log based on the determined identified number of user interfaces without proper accessibility; identifying, by one or more computer processors, one or more messages for trace and bug log files; assigning, by one or more computer processors, a severity category, from a plurality of severity categories, to the identified test report log based on the identified one or more messages for trace and bug log files; determining, by one or more computer processors, a percentage completion that corresponds to the identified test report log based on the identified one or more errors; identifying, by one or more computer processors, a number of user interfaces without proper accessibility; and assigning, by one or more computer processors, a severity category, from a plurality of severity categories, to the identified test report log based on the determined percentage completion and the identified number of user interfaces without proper accessibility; and determining, by one or more computer processors, a severity category for the identified test report log based on the determined severity category for the one or more identified errors in the identified test report log.