analyze_outcomes: allow ignored test suites to have a dot in the name

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/tests/scripts/analyze_outcomes.py b/tests/scripts/analyze_outcomes.py
index 085ba7a..8db2ef7 100755
--- a/tests/scripts/analyze_outcomes.py
+++ b/tests/scripts/analyze_outcomes.py
@@ -150,7 +150,7 @@
         # but issue an error if they're not (means we have a bad entry).
         ignored = False
         if full_test_suite in ignored_tests:
-            for str_or_re in ignored_tests[test_suite]:
+            for str_or_re in ignored_tests[full_test_suite]:
                 if name_matches_pattern(test_string, str_or_re):
                     ignored = True