Merge - Generate data points from all the administrations of a drug (not only the first one)

[PavanReddy28]

Update

Added support for multiple medication administration for the following as part of this commit:

1. MIMIC Parser
2. Medication <> Lab pairs generator

Pending fetures for HIRID Parser only.

[dancoster]

• Please validate that the results of this function with k=1 is identical to the previous function.

[PavanReddy28]

Commits :

1. MIMIC Parser changes and Med lab pair generation support : https://github.com/dancoster/DrugLab/commit/f64e27dedd802b27e9f6e64aabb0b2ab43e956d0
2. HiRiD Parser changes : https://github.com/dancoster/DrugLab/commit/3436b8b5260632a449171db06218ddc61e3b5108