Add schemas for querying physical router sent statistics related to
PFE memory, fabric usage, and LSP information
Closes-Bug: #1402129

Change-Id: Ia03cb38ff1873fe17fd2a27441f46902c8e39605
Merge "Add schemas for querying physical router sent statistics related to PFE memory, fabric usage, and LSP information Closes-Bug: #1402129"