Updated unit test on option parser

The new selenium options parser has a slightly different behaviour when
it comes to multiple arguments with generious spacing within its option
string. In stead of leaving preceeding and trailing spaces it removes those.
This change is approved files corrects for this change.

Author: emanlove

utest/test/keywords/approved_files/test_selenium_options_parser.test_split_options.approved.txt

@@ -5,4 +5,4 @@ Selenium options string splitting
 2) ['attribute=True']
 3) ['attribute="semi;colons;middle"', 'other_attribute=True']
 4) ['method("arg1;")', 'method(";arg2;")']
-5) ['method ( " arg1 ")', ' method ( " arg2 " ) ']
+5) ['method ( " arg1 ")', 'method ( " arg2 " )']