updates mr-2018-01 to pixel athena monitoring code

See merge request atlas/athena!10174

(cherry picked from commit e4adeecd [formerly c8e49c3d7cd886609701441ee5dd10e28ddcd4c4])

dc40c0a8 adding 100 LB occupancy and track efficiency histograms
d05a320d making previous commit compiling and working by adding helper function to divide LW histos
c3523049 bugfix in new 100lb histograms
781bdefa procHistograms: adding more info in case of failure
7b05135b adjustments to 100LB histograms anticipating their a-posteriori merging
bc78136b fixing last 100 LB track efficiency histograms
390b1026 adding labels to 100 LB histogram to ensure proper merging (by label) in case of publishing hiccups
9c252561 fixes to 100 LB and the related filling code after debugging
bf60bb86 bugfix in m_average_pixocc histogram (IBL FE map)
66edcd06 Adding per PP0 histograms into Hits and Clusters On Track; suppoting code mainly…
161cfa8f unchecked pointer, uninitialized variable
b712bffe Minor clear commentted vars
7b227e5c Minor clear commentted vars
47cc6648 Disable copy constructor and '=' operator for 3 classes
c08eab91 fix indentation of the destructor
1bf14f3b revert indentation
ff87ae86 optimisation and clean-up of tracking loop
3b4357b3 Enforce bracketing/parenthesis rules
7a98ee7a fixing access index
3f90d646 Modify Cluster to fix Coverity issues 115555 etc
9efa7324 removing IBL split for Occupancy_per_pixel histos, can't maintain proper…

Former-commit-id: 52ad94549c16c878b2b45b930971ab4f3ca746c4