[test]: exclude two PG tests on PG < 9.5

These use ADD INDEX IF NOT EXISTS which is only supporter in 9.5+

Author: dr-itz

test/rails/excludes/postgresql/ActiveRecord/Migration/IndexTest.rb

@@ -0,0 +1,4 @@
+if ActiveRecord::Base.connection.database_version < 90500
+  exclude :test_add_index_which_already_exists_does_not_raise_error_with_option, 'ADD INDEX IF NOT EXISTS is PG >= 9.5'
+  exclude :test_add_index_with_if_not_exists_matches_exact_index, 'ADD INDEX IF NOT EXISTS is PG >= 9.5'
+end

test/rails/excludes/postgresql/MigrationTest.rb

@@ -0,0 +1,3 @@
+if ActiveRecord::Base.connection.database_version < 90500
+  exclude :test_create_table_with_indexes_and_if_not_exists_true, 'ADD INDEX IF NOT EXISTS is PG >= 9.5'
+end