Update roles and netbox inventory

roles/geerlingguy.java/.travis.yml

@@ -10,6 +10,7 @@ env:
     - MOLECULE_DISTRO: centos7
     - MOLECULE_DISTRO: centos6
     - MOLECULE_DISTRO: fedora31
+    - MOLECULE_DISTRO: ubuntu2004
     - MOLECULE_DISTRO: ubuntu1804
     - MOLECULE_DISTRO: ubuntu1604
     - MOLECULE_DISTRO: debian10
@@ -17,7 +18,7 @@ env:
 
 install:
   # Install test dependencies.
-  - pip install molecule docker
+  - pip install molecule yamllint ansible-lint docker
 
 before_script:
   # Use actual Ansible Galaxy role name for the project directory.