Add LenovoXCC::getBulkEnergy() function and xccBulkEnergy sensor type for XCC's bulk energy readings

Add LenovoXCC::getBulkPower() and xccBulkPower sensor type to read the XCC's bulk power buffer (100 readings, 10ms interval)

Rename xcc sensor to xccBulkPower, move code for reading it from IPMISensorGroup::read() to LenovoXCC::getBulkPower()

- Based on the regressor plugin

- Making all configurator destructors virtual
- Minor changes to the regressor plugin to accommodate the
classification extension

Allow for actual configuration files to be specified on command line, not just configuration directories. Add exception handling to main of pusher, collectagent, grafanaserver

Don't fetch the OPA libraries when they are already installed via RPM. Add the OPA plugin to the list of plugins to be built by default.

- New filtering methods applies a filtering regular expression to all
node names in the node list of a job; the mode of the filtered node names
is then computed, and the job is processed only if this matches an
arbitrary "match" string
- Can be used to assign jobs to different islands in a HPC system based
on the allocation of nodes

- Allows to reduce the size of the query results considerably

- Uses an overloaded version of the querySensor() method