Consider  @,! in properties protection rule as a configuration error

In roles based property protection, if '@' and '!' are in the same rule then the
glance api will not start considering this an Invalid Configuration.

DocImpact
Closes-bug: #1260333

Change-Id: I1d304f5c505ae9e2486ff653dda205fc2d851c2b
Merge "Consider  @,! in properties protection rule as a configuration error"