Spring DSL and sftp password

[Tyler Durvik]

I have routes defined that use the sftp endpoint.  Right now I have
the user password stored in the camel-context.xml file, but would like
to store the password in a separate file.  So instead of

<from uri="sftp://auser@1.2.3.4/files?password=whatever&amp;delete=true"; />

I would like the following:

<from 
uri="sftp://auser@1.2.3.4/files?password=${password.from.file}&amp;delete=true";
/>

I believe this can be done using Spring's
PropertyPlaceholderConfigurer, but it does not seem to work correctly.