Fix for non-present odid content info file

The ODID MediaEngine wasn't handling the non-presence of the content
 resource file. The presence of this file is optional. But the
 ODIDDataSource code wasn't handling it - and our content prep tools
 have always been producing it.

Also added a fix to deal with non-recognized entries in the
 resource.info (for dealing with resource.info files with new
 parameters).

Tested by attempting to access trick streams without .info files.

Tested with and without the content
Merge pull request #12 from cablelabs/cbl_cpratt/fix-for-missing-resource-info

Fix for non-present odid content info file