Change the default value of IMAGE_SCRIPTS_URL in task-java-s2i

[anilabhabaral]

Issue:

In the task-java-s2i the default IMAGE_SCRIPTS_URL is /usr/libexec/s2i

    - name: IMAGE_SCRIPTS_URL
      type: string
      default: image:///usr/libexec/s2i     <---------     
      description: |
        Specify a URL containing the default assemble and run scripts for the builder image

But in all the latest OpenJDK Builder image the s2i IMAGE_SCRIPTS are available in this directory image:///usr/local/s2i .

For example in OpenJDK 17 builder image see the Dockerfile(line no 154): https://catalog.redhat.com/software/containers/ubi8/openjdk-17/618bdbf34ae3739687568813?container-tabs=dockerfile

            io.openshift.s2i.scripts-url="image:///usr/local/s2i" \

And in OpenJDK 11 builder image Dockerfile(line no 174): https://catalog.redhat.com/software/containers/ubi8/openjdk-11/5dd6a4b45a13461646f677f4?container-tabs=dockerfile

            io.openshift.s2i.scripts-url="image:///usr/local/s2i" \

Fix:

As per the above examples i think it would be better to make the default IMAGE_SCRIPTS_URL to image:///usr/local/s2i.

I will create a PR for this change.