fix SslTomEETest to work with JDK 8 keytool

Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.09 sec <<< FAILURE! - in org.apache.tomee.embedded.SslTomEETest
test(org.apache.tomee.embedded.SslTomEETest) Time elapsed: 0.015 sec <<< ERROR!
java.lang.ClassNotFoundException: com.ibm.crypto.tools.KeyTool
at java.net.URLClassLoader$1.run(URLClassLoader.java:372)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:259)
at org.apache.tomee.embedded.SslTomEETest.test(SslTomEETest.java:43)

Results :

Tests in error:
SslTomEETest.test:43 » ClassNotFound com.ibm.crypto.tools.KeyTool