Re-indent code in DQM/Physics.

clang-format --style=Google
Fixed several memory leaks in DQM/Physics/SingleTopTChannelLeptonDQM.

By making sure every allocation is accounted for,
using the magic of unique_ptr.
Merge pull request #5279 from dmitrijus/memoryleakfixdqmphysics

Fix several memory leaks in DQM/Physics/SingleTopTChannelLeptonDQM