Update to aarch64-shenandoah-jdk8u282-b01 (EA)
    
    Update release notes for 8u282.
    Remove PR3601, covered upstream by JDK-8062808.
    Remove upstreamed JDK-8197981/PR3548, JDK-8062808/PR3548 & JDK-8254177.
    Extend RH1750419 alt-java fix to include external debuginfo, following JDK-8252395
    Adapt JDK-8143245 patch, following JDK-8254166
    Remove upstreamed patch PR3519
    Fixed typo in variable
    Use RSA as default for keytool, as DSA is disabled in all crypto policies except LEGACY
    Add directories to files directive for demo package.
    Include a test in the RPM to check the build has the correct vendor information.
    Use 'oj_' prefix on new vendor globals to avoid a conflict with RPM's vendor value.
    Cleanup package descriptions and version number placement.