adding teaching/practical_courses dbs info

data/modules/dbs/teaching/practical_courses.json

+{
+
+  "general": {
+    "url": "https://git.h2t.iar.kit.edu/teaching/practical-courses/axii-database",
+    "authors": ["Fabian Reister <fabian.reister@kit.edu>"],
+    "database": {
+      "for_namespace": "teaching/practical_courses"
+    }
+  },
+
+  "update": {
+    "git": {
+      "h2t_gitlab_slug": "teaching/practical-courses/axii-database"
+    }
+  },
+  "install": {
+    "env": {
+      "TEACHING_PRACTICAL_COURSES_AXII_DATABASE": "$MODULE_PATH",
+      "ARMARX_MODULES": "$MODULE_PATH:$ARMARX_MODULES"
+    }
+  }
+
+}