feat(config_management): Ability to add a host to a config group

!17 #42

app/config_management/forms/group_hosts.py

@@ -0,0 +1,20 @@
+from django import forms
+
+from itam.models.device import Device
+
+from config_management.models.groups import ConfigGroups, ConfigGroupHosts
+
+
+class ConfigGroupHostsForm(forms.ModelForm):
+
+    __name__ = 'asdsa'
+
+    class Meta:
+
+        fields = [
+            'host'
+        ]
+
+        model = ConfigGroupHosts
+
+    prefix = 'config_group_hosts'