Small upgrade of Sandbox_Setup.md
Issue-ID: SO-3073
Signed-off-by: Krzysztof Gajewski <krzysztof.gajewski@nokia.com>
Change-Id: I1815ef3f1835b28210b7e4182e308ebc6e70c052
 
 ```
 cd ci-management
-sudo apt-get install python-virtualenv
+pip install virtualenv
 virtualenv onap_sandbox
 source onap_sandbox/bin/activate
 pip install jenkins-job-builder
 
     stream:
       - 'master':
           branch: 'master'
+          java-version: openjdk11
       - 'elalto':
           branch: 'elalto'
       - 'frankfurt':
     build-node: ubuntu1804-builder-4c-4g
     project: 'so/libs'
     project-name: 'so-libs'
+    java-version: openjdk11
     branch: 'master'
     mvn-settings: 'so-libs-settings'
     mvn-goals: 'clean install'
     nexus-iq-namespace: 'onap-'
     project: so/libs
     project-name: 'so-libs'
+    java-version: openjdk11
     branch: 'master'
     mvn-settings: 'so-libs-settings'