Code cleanup

Removing commented out code
1. Set block id to fix updating of block information when retrieving fieldmap details
2. Check column & range when setting plot coordinates, if both are null, return an empty string
3. Update block information for every instance when block id is available

Reviewer: Mae Turiana

Issue: GCP-9732
Adding JaCoCo (Eclemma) plugin for code coverage reporting.
Code cleanup : removed commented out lines of code and optimized imports

GCP-10152

Reviewer : Cyrus Venn Casada
"equals" as a method name should be exclusively used to override Object.equals(Object).
Return of boolean expressions should not be wrapped into an if-else statement.
Fix the circular reference in toString() methods of DmsProject and ProjectProperty which could lead to StackOverflow error when these objects are used in string operations.
Removed unused import.
Fixed SQL script used to retrieve standard variables in a project given their names

Created unit tests to cover the ff scenarios :
 - for unknown variable names
 - for known existing variables
 - for newly created variables

 GCP-10137

 Reviewer : Mae Turiana
Update code to resolve Sonar reported problems

GCP-10137

Reviewer : Mae Turiana
Create unit tests for update of fieldmap block information

GCP-9732

Reviewer: Aldrin Batac
Add curly braces to if-else statements, remove commented codes, unused variables and methods.

GCP-9732

Reviewer: Daniel Jao
Throw new error when there is no measurementDataset found for the nursery/trial

GCP-10236

Reviewer: Aldrin Batac
Add unit test to check measurement dataset

GCP-10236

Reviewer: Aldrin Batac
Remove unused imports, put else statement after the right curly brace, move trailing comments to a new line, remove useless parentheses in if statement

GCP-10236

Reviewer: Crisjaira Villarino
Feat: Added character length check for variable names in the import service

GCP-10240

Reviewer: Daniel Villafuerte
Cleanup: Address most SonarQube issues.

The ff. issues are not yet addressed in this commit:
-Cyclomatic Complexities
-Nested for/while/if/else(s)
-Todo comments

GCP-10250

Reviewer: Mae Turiana
Cleanup: Added curly braces on control flows with missing curly braces

GCP-10278

Reviewer: Mae Turiana
Feat: Added invalid char check for variable names in the import service

GCP-10240

Reviewer: Crisjaira Villarino
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