#1144 Test org.jfree.data.time.MonthTest.testParseMonth() fail unless Locale has english month names

[Ola Mattsson]

test 3 in org.jfree.data.time.MonthTest.testParseMonth() fails because the String to parse is "March 1993".
It would of course work if the Locale for the JVM running the test has english language but for other Locales the 3rd month of the year probably have different names.