As of JDK8 u161 and u162 the Unlimited JCE is enabled by default

[mattrpav]

You should be able to remove the steps of adding the Unlimited JCE add-on as they are installed an enabled by default.

Release notes: http://www.oracle.com/technetwork/java/javase/8u161-relnotes-4021379.html

security-libs/javax.crypto
Unlimited cryptography enabled by default
The JDK uses the Java Cryptography Extension (JCE) Jurisdiction Policy files to configure
cryptographic algorithm restrictions. Previously, the Policy files in the JDK placed limits on various ?
algorithms. This release ships with both the limited and unlimited jurisdiction policy files, with
unlimited being the default. The behavior can be controlled via the new 'crypto.policy' Security
property found in the /lib/java.security file. Please refer to that file for more information on this
property.

ref: JDK-8170157