tauEventTPCnv: Fix gcc9 warnings.

In C++11, implicit declarations of copy and assignment are deprecated if the class has a user defined destructor or copy or assignment. gcc9 now warns about this by default. Adjust to avoid the warning.

This merge request affects 1 package:

• Reconstruction/tauEventTPCnv

added Reconstruction Tau master review-pending-level-1 labels

CI Result SUCCESS

	Athena	AthSimulation
externals
cmake
make
required tests
optional tests

Full details available at NICOS MR-20843-2019-02-02-06-14
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
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added review-approved label and removed review-pending-level-1 label

merged

mentioned in commit 27aadf22

added sweep:ignore label