[Documentation:Developer] Fedora VM installation instructions (#575)

Added Fedora Linux/RHEL install instructions for vagrant and VirtualBox
to the Submitty.org developer page, as well as a few common issues.

Author: arougey

_docs/developer/getting_started/vm_install_using_vagrant.md

@@ -147,6 +147,40 @@ Below are quick steps to get everything installed and running.
      Vagrant: <https://developer.hashicorp.com/vagrant/downloads> 
      (if that doesn't work, try: <https://vagrant-deb.linestarve.com/>)
 
+   **Fedora/Red Hat Linux**
+
+   * For Fedora, the latest version of VirtualBox is recommended to prevent errors. Download the RPM from the virtual box website. Make sure your version of 
+     Fedora is up to date using
+     ```
+     sudo dnf update
+     sudo dnf upgrade
+     ```
+     and inputting your password. Then install the Virtual Box rpm using: 
+     ```
+     sudo dnf install VirtualBox-xxxxx.rpm 
+     ```
+     Install Vagrant using: 
+     ```
+     sudo dnf install vagrant
+     ```
+     Now move on to step 5.
+
+   **NOTE**
+   when running vagrant up, use `vagrant up --provider=virtualbox` so it doesnt default to libvirt
+
+   **Common errors when running vagrant up(Fedora/RHEL)**
+   1. Missing virtnetworkd:
+      Enable it in your terminal by running:
+      ```
+      sudo systemctl start virtnetworkd
+      ```
+   2. If your vagrant ever freezes kill it with 
+      '''
+      VBoxManage controlvm VM_NAME poweroff
+      '''
+      or if that doesn't work, reboot the computer and then run `vagrant destroy` before re-running `vagrant up --provider=virtualbox` again.
+
+
 5. Clone [the Submitty repository](https://github.com/Submitty/Submitty) to a location on
    your computer (the "host").