Refactored P4 test

A more descriptive name is put to the p4 test so as to leave space for additional tests coming soon. This test applies L1 forwarding between a P4 switch's ports, thus the new name of this test is set accordingly.

Closes issue #219 (closed)

src/tests/p4-fwd-l1/README.md

@@ -37,10 +37,10 @@ Check the `./tests/Objects.py` file before running the experiment to make sure t
 
 In the `./mininet/` directory there are different mininet topology examples. The current `./tests/Objects.py` file corresponds to the `./mininet/8switch3path.py` topology. Additionally there is a backup file `./tests/topologies/6switchObjects.py` which corresponds to the `./mininet/6switch2path.py`.
 
-## P4 artifacts
+## P4 artefacts
 
 In the `./p4/` directory there are compiled p4 artefacts of the pipeline that will be pushed to the p4 switch, along with the p4-runtime definitions.
-The `./setup.sh` script copies from this directory. So if you need to change p4 program, make sure to put the compiled artefacts here.
+The `./setup.sh` script copies from this directory. So if you need to change p4 program, make sure to put the compiled artefacts there.
 
 ## Latency probe