Fix GERONIMO-4594. From this commit javamail 1.4 spec 1.7.2 or later is required.

git-svn-id: https://svn.apache.org/repos/asf/geronimo/javamail/trunk@1641698 13f79535-47bb-0310-9956-ffa450edef68
Fix GERONIMO-5429 GERONIMO-5430 GERONIMO-5873, fixed also APOP authentication for POP3, POP3 store can now use STARTTLS

git-svn-id: https://svn.apache.org/repos/asf/geronimo/javamail/trunk@1641706 13f79535-47bb-0310-9956-ffa450edef68
Replaced greenmail with apache james for unit tests, Added a lot of new testcases, Version bump to 1.9.0, some pom updates, site added, travis CI support added. This commit only touch test code.

git-svn-id: https://svn.apache.org/repos/asf/geronimo/javamail/trunk@1641709 13f79535-47bb-0310-9956-ffa450edef68