Revert new directory naming for jdk 8 releases

[karianna]

Initial report:

I have been building the openjdk8-openj9 milestone 1 builds for the upcoming quarterly release.  Most of the jobs ran OK - the builds are at https://github.com/AdoptOpenJDK/openjdk8-binaries/releases/tag/jdk8u212-b01_openj9-0.14.0-m1.  I have a question about the top level directory in the download archives.  For the Jan update the top level directory was jdk8u202-b08.  For this release it is jdk-8.0.212 (the latest tag level in the open9-openjdk-jdk8 extensions repository is jdk8u212-b01).   For the jdk11 Jan update it was jdk-11.0.2+9.  What determines what this directory will be called?  Was the change for jdk8 intentional - or does it imply something was incorrect in the build parameters I used?  If it is intentional, shouldn't the name also include the build level - e.g. jdk-8.0.212-b01?  In order for openjdk-hotspot and openjdk-openj9 to coexist perhaps the openj9 level should be appended to the directory name - e.g. jdk-8.0.212_openj9-0.14.0?

Discussed on a build team call - we will revert to the jdk-8.0.212-b01 style naming for now and resolve fully in #1016 going forward

[karianna]

We will unify this later in #1016

[karianna]

See #1034