Error parsing Modelica packages correctly

[anandkp92]

To recreate this issue:
Set up modelica-json and add $MODELICAJSONPATH to environment variables

git clone https://github.com/ibpsa/project1-boptest
cd /path/to/project1-boptest
node $MODELICAJSONPATH/app.js -f testcases/multizone_simple_office_air/models/MultiZoneSimpleOfficeAir.TestCases.TestCase.mo -o semantic -m modelica -d m2j_output

This does not generate JSON or objects for MultiZoneSimpleOfficeAir.BaseClasses.*
It works when you change the working directory to project1-boptest/testcases/multizone_simple_office_air/models.

This should be fixed because we know the package of MultiZoneSimpleOfficeAir.TestCases.TestCase.