* adding map_server tests & starting port of costmap_2d package

* adding integration test node

* + integration tests

* ++ integration test

* create branch for tests

* adding map_server tests & starting port of costmap_2d package

* adding integration test node

* + integration tests

* ++ integration test

* create branch for tests

* Adding ported map_server, env_model, and env_model_msgs

* Delete gridmap.h

This file is unused / hasn't been ported to ROS2 yet

* Map server tests (#1)

* adding map_server tests & starting port of costmap_2d package

* adding integration test node

* + integration tests

* create branch for tests

* added license info, addressed formatting and white spaces, implemented tests etc.

* restructure of map_server

* additional directory refactor

* clean up package

* all test passing (cpplint, uncrustify, unit, integration, etc.)

* added TODO for publisher

* dropping yaml-cpp backwards support, changed service/topic name

* addressing feedback: changed all fprint to RCLCPP_ERROR, split main and server class, fixed yaml-cpp path, throwing exceptions up from yaml parser, cleaned cmakelist, added gtest assert throws, fixes naming conventions, added namespace

* changed class/file names, replaced fprints, took out redundant createMap, adhered to project cmakelist style and build_test, deleted unused packages

* changed name integration to component test, passes unit, component, lint tests, uncrustify, etc.