test/case: minor, cleanup

- Drop redundant comments
 - Drop redundant imports
 - PEP-8 fixes

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

test/case/ietf_system/hostname/hostname.adoc

@@ -26,7 +26,7 @@ endif::topdoc[]
 . Verify new hostname 'h0stn4m3'
 . Set hostname to '%h-%m'
 . Verify hostname is  %h-%m in running configuration
-. Verify hostname format in operational, according to format
+. Verify hostname format in operational
 
 
 <<<

test/case/ietf_system/hostname/test.py

@@ -10,8 +10,6 @@ where MAC is the last three bytes of the base MAC address.
 
 e.g. ix-01-01-01.
 """
-import random
-import string
 import re
 import infamy
 
@@ -20,33 +18,33 @@ with infamy.Test() as test:
         env = infamy.Env()
         target = env.attach("target", "mgmt")
         tgtssh = env.attach("target", "mgmt", "ssh")
-        fmt = "%h-%m"
-        new="h0stn4m3"
+        FMT = "%h-%m"
+        NEW = "h0stn4m3"
 
     with test.step("Set hostname to 'h0stn4m3'"):
         target.put_config_dict("ietf-system", {
             "system": {
-                "hostname": new,
+                "hostname": NEW,
             }
         })
 
     with test.step("Verify new hostname 'h0stn4m3'"):
         running = target.get_config_dict("/ietf-system:system")
-        assert running["system"]["hostname"] == new
+        assert running["system"]["hostname"] == NEW
 
     with test.step("Set hostname to '%h-%m'"):
         target.put_config_dict("ietf-system", {
             "system": {
-                "hostname": fmt,
+                "hostname": FMT,
             }
         })
 
     with test.step("Verify hostname is  %h-%m in running configuration"):
         running = target.get_config_dict("/ietf-system:system")
-        if running["system"]["hostname"] != fmt:
+        if running["system"]["hostname"] != FMT:
             test.fail()
 
-    with test.step("Verify hostname format in operational, according to format"):
+    with test.step("Verify hostname format in operational"):
         cmd = tgtssh.runsh("sed -n s/^DEFAULT_HOSTNAME=//p /etc/os-release")
         default = cmd.stdout.rstrip()
 

test/case/infix_containers/container_basic/test.py

@@ -1,11 +1,4 @@
 #!/usr/bin/env python3
-#
-# Verify that a simple web server container can be configured to run
-# with host networking, on port 80.  Operation is verified using a
-# simple GET request for index.html and checking for a key phrase.
-#
-# The RPC actions: stop + start, and restart are also verified.
-#
 """
 Container basic
 

test/case/infix_containers/container_bridge/test.py

@@ -1,9 +1,4 @@
 #!/usr/bin/env python3
-#
-# Verify connectivity with a simple web server container from behind a
-# docker0 bridge.  As an added twist, this test also verifies content
-# mounts, i.e., custom index.html from running-config.
-#
 """
 Container with bridge network
 

test/case/infix_containers/container_phys/test.py

@@ -1,15 +1,10 @@
 #!/usr/bin/env python3
-#
-# Verify connectivity with a simple web server container that's been
-# given a physical interface instead of an end of a VETH pair.
-#
 """
 Container with physical interface
 
 Verify connectivity with a simple web server container that's been
 given a physical interface instead of an end of a VETH pair.
 """
-import base64
 import infamy
 from   infamy.util import until, to_binary
 

test/case/infix_containers/container_veth/test.py

@@ -1,8 +1,4 @@
 #!/usr/bin/env python3
-#
-# Verify connectivity with a simple web server container from behind a
-# regular bridge, a VETH pair connects the container to the bridge.
-#
 r"""
 Container with VETH pair