This attribute specifies the override holding priority which should
be signalled to the VCC connection at the start of the test. Holding
priority is of importance in conjuction with IMA links, where some
links fail and the resulting bandwidth is less than the requested
bandwidth for all connections. In that case, some connections may
be released based on the connection's holding priority.
Zero (0) is thie highest holding priority, and four (4) is the lowest
priority. A setting of zero to four overrides whatever holding
priority that has been configured at the connection (VCC). A setting
of noOverride means that the connection should use its internally
configured holding priority.