CA-44731: record timings for all xapi startup tasks for diagnostic purposes. Data can be retrieved with existing 'xe diagnostic-timing-stats' CLI command.
CA-44731: record timings for all xapi startup tasks for diagnostic purposes. Data can be retrieved with existing 'xe diagnostic-timing-stats' CLI command.

Signed-off-by: David Scott <63c9eb0ea83039690fefa11afe17873ba8278a56@eu.citrix.com>

johnelse/xcp-rrdd,simonjbeaumont/xcp-rrdd,koushikcgit/xcp-rrdd,djs55/squeezed,djs55/xcp-networkd,djs55/xcp-rrdd,robhoes/squeezed,sharady/xcp-networkd,djs55/xcp-rrdd,simonjbeaumont/xcp-rrdd,koushikcgit/xcp-rrdd,koushikcgit/xcp-networkd,koushikcgit/xcp-networkd,sharady/xcp-networkd,djs55/xcp-networkd,koushikcgit/xcp-rrdd,johnelse/xcp-rrdd