SR-7589: Test Case 'TestNumberFormatter.test_currencyPluralMinimumIntegerDigits' crashed on Ubuntu 14.04

- Newer verison of ICU used now fixes these issues.

Author: spevans

TestFoundation/TestNumberFormatter.swift

@@ -30,9 +30,9 @@ class TestNumberFormatter: XCTestCase {
             ("test_scientificMinimumIntegerDigits", test_scientificMinimumIntegerDigits),
             ("test_spellOutMinimumIntegerDigits", test_spellOutMinimumIntegerDigits),
             ("test_ordinalMinimumIntegerDigits", test_ordinalMinimumIntegerDigits),
-            // XFAIL: breaks on Ubuntu 14.04 probably ICU - ("test_currencyPluralMinimumIntegerDigits", test_currencyPluralMinimumIntegerDigits),
-            // XFAIL: breaks on Ubuntu 14.04 probably ICU - ("test_currencyISOCodeMinimumIntegerDigits", test_currencyISOCodeMinimumIntegerDigits),
-            // XFAIL: breaks on Ubuntu 14.04 probably ICU - ("test_currencyAccountingMinimumIntegerDigits", test_currencyAccountingMinimumIntegerDigits),
+            ("test_currencyPluralMinimumIntegerDigits", test_currencyPluralMinimumIntegerDigits),
+            ("test_currencyISOCodeMinimumIntegerDigits", test_currencyISOCodeMinimumIntegerDigits),
+            ("test_currencyAccountingMinimumIntegerDigits", test_currencyAccountingMinimumIntegerDigits),
             ("test_maximumIntegerDigits", test_maximumIntegerDigits),
             ("test_minimumFractionDigits", test_minimumFractionDigits),
             ("test_maximumFractionDigits", test_maximumFractionDigits),