UMLS password could not be set in shell as ctakes.umlspw

The setting of passwords etc. is allowable outside .xml descriptor files by setting an environment variable with the name of the value required in the xml file. For instance, umls dictionary lookup required a password to be set in the .xml as ctakes.umlspw OR in the environment as ctakes.umlspw

Unfortunately, setting a variable with a dot in the name is difficult in some shell environments.

Allow the user to set variables in their environment with an underscore in place of the dot, such as ctakes_umlspw