Refactored all profile paths.

All profile paths are of the form:
/<resource type>/<tenant alias>/<resource id>

Examples:
 * /user/gt/VPlyuTp1sf
 * /group/nyu/eVynpeg0LM
 * /content/cam/VT-kmVy0s5
 * /discussion/pmc/TVUvDVp0cf