The core of the problem seems to be here:
java.lang.ClassNotFoundException: javax.net.ssl.SSLContext
at com.webmethods.jms.ssl.AwSSLJSSEUtil.createSslContext(AwSSLJSSEUtil.java:112)
Have you tried opening your project in Eclipse and taking a look at that method? Apparently something has changed so that the SSLContext class is no longer where it is expected. Chances are it's been moved. Correcting your imports should fix this.