1. Add new methods to determine if the standard variable is a numerical categorical variate or is numeric
2. Test class for the new methods

GCP-10239

Reviewer: Crisjaira Villarino
1. Included categorical variates as possible traits for analysis - which means checking values in Phenotype.cvalue_id for non-null values
2. Included Junit test for the changes made for (1) with sample Excel files for import

GCP-10239

Reviewer: Aldrin Batac
Code cleanup
1. Removed unused comments
2. Reduced number of parameters of constructors to less than or equal to 7
3. Used of not empty instead of comparing the object size to greater than 0
4. Used a different variable instead of changing the value of the parameter of the parameter
5. Change condition of not instanceof to use == false instead of !

GCP-10239

Reviewer: Aldrin Batac