Exception "Unable to register security provider: java.lang.ClassNotFoundException: org.bouncycastle.jce.provider.BouncyCastleProvider" when invoking bin/client script

Issue

• After patching Fuse 6.3 or A-MQ 6.3 to Rollup patch 20, or installing a new Fuse or A-MQ Rollup 20 product home, the bin/client shows the following exception

$ jboss-fuse-6.3.0.redhat-516/bin/client
client: JAVA_HOME not set; results may vary
Unable to register security provider: java.lang.ClassNotFoundException: org.bouncycastle.jce.provider.BouncyCastleProvider
Logging in as karaf
Password:^C 
$ cat jboss-fuse-6.3.0.redhat-516/bin/client | grep bcprov
    CLASSPATH="$CLASSPATH:$KARAF_HOME/system/org/bouncycastle/bcprov-jdk15on/1.56/bcprov-jdk15on-1.56.jar"