resolve issue with transaction buffersize
resolve issue with transaction buffersize

specifically when the transaction was set to none we were still
showing the docs for the buffersize question but not asking that
question. So fixed that also defaulted the variable so the desc.xml
template could handle this situation.

vprince1/generator-alfresco,vprince1/generator-alfresco,binduwavell/generator-alfresco,vprince1/generator-alfresco,binduwavell/generator-alfresco,binduwavell/generator-alfresco,binduwavell/generator-alfresco,vprince1/generator-alfresco