UI-62009 when using silent install response file em_using_existing_db.rsp on an Oracle Database 11g

When installing a new Enterprise manager Grid Control in an existing 11g Database using the provided reponse file em_using_existing_db.rsp.
You are challenged with a lot of variables which need to match the OS perfectly.

Earlier i provided a solution for adjusting the oraparam.ini file to overcome compatibility problems for OS certification.
However , when using a response file method like here :

./runInstaller -noconfig -ignoreSysPrereqs -silent -responseFile response/em_using_existing_db.rsp use_prereq_checker=false

The silent installer uses the the /etc/SuSE-release file to pass OS information to a file called /usr/bin/lsb_release.
When this SuSE-release file still contains the 10 release version number, your silent install will stop and fail.
In the silent install log ( found under your oraInventory/logs/* ) you might find a very global error warning stating ;

UI-62009:

Some requirement checks failed. You must fulfill these requirements before

continuing with the installation, at which time they will be rechecked.

For solving this we need to backup the /etc/SuSE-release file and adjust the parameter to fake a 9 version OS.

SUSE Linux Enterprise Server 9 (x86_64)
VERSION = 9
PATCHLEVEL = 2

After a restart of the installation , your silent install will pass this test and continue the journey.

Hint : Also be sure to unset ENV as this is the next problem to face when set
SEVERE:Install has detected that the environment variable ENV has been set. Please unset this variable and restart the install.