Addition of third example for Property Protections

Includes an example to limit all property interactions to admin only using policy rule
context_is_admin defined in policy.json

Change-Id: I22dddc06a84312b3b1cbd195cb84839e0321a9f0
Closes-Bug: #1243945
Replace qpid_host with qpid_hostname

This patch replaces `qpid_host` with `qpid_hostname` in both the
documentation and the config file sample. `qpid_host` has been shipped
as the parameter to specify qpid's hostname, although the correct one is
`qpid_hostname`.

DocImpact
Closes-bug 1242715

Change-Id: I25f2d0e505560e1762f7f059728c33c47a23439e
Merge "Addition of third example for Property Protections"
Merge "Replace qpid_host with qpid_hostname"