OFBIZ-7763 :
Remove all bsh libraries and bsh remaining fonctionnalities.
Bsh interpreter is replaced by GroovyShell evaluation.

To avoid groovyShell undefined var exception, the evaluated expression is analysed, detecting variables used and setting its to null if undefined in context.
Today only alphabetic variable with '_' are detected (i.e. my_variable==null).
Add in example a test replacement of " syntax to simple quote.
Remove all found bsh references

git-svn-id: https://svn.apache.org/repos/asf/ofbiz/trunk@1752231 13f79535-47bb-0310-9956-ffa450edef68