Unnecessary update procedures (ENABLE_CLEAR_REFERENCES=false)

[toshihiro-shiino]

I have downloaded "https://github.com/servicecatalog/development/releases/download/v17.1.0/oscm-install-pack.zip", and read install/doc/en/Installation.pdf after extracting the file.

There is below description in “4.1 Updating From CT-MG V17.0 or Later”:

3. Set the following setting in the JVM Options of the application server to false:
   -Dorg.apache.catalina.loader.WebappClassLoader.ENABLE_CLEAR_REFERENCES=false

It naturally indicates only v17.0 since the released version is v17.1, however, the value org.apache.catalina.loader.WebappClassLoader.ENABLE_CLEAR_REFERENCES is always set to false in v17.0, so it seems the above description is not necessary.