OCSADV-173: Infrastructure for ITC integration in OCS tree.

Some infrastructure work for integration of the ITC code into the OCS code tree. Note that we would like to be able to allow science folks to work with the ITC code and run a minimal OSGi container with the ITC web application for testing and development without accessing the credentials project.

1) Added an itc servlet bundle; the dummy servlet will later be replaced with the existing ITC servlet.

2) Added a configuration to the spdb app which allows to bring up an OSGi container with nothing more but the ITC servlet. This is needed in order to allow science folks easy access to the web app for development and testing.

3) Added developer credentials to the credentials template file. This is necessary so that - instead of checking out the credentials project and creating the symlinks - science people working with ITC can use this as a default credentials file by renaming it to OcsCredentials.scala which allows them to compile and run an OSGi container with the ITC servlet.