Add HTTP/1 test

• Add a simple HTTP/1 test with basic setup + PCF

test/all_nfs.robot

+# Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The OpenAirInterface Software Alliance licenses this file to You under
+# the OAI Public License, Version 1.1  (the "License"); you may not use this file
+# except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.openairinterface.org/?page_id=698
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ------------------------------------------------------------------------------
+# For more information about the OpenAirInterface (OAI) Software Alliance:
+#   contact@openairinterface.org
+# ---------------------------------------------------------------------
+
+*** Settings ***
+Library    Process
+Library    CNTestLib.py
+Library    GNBSimTestLib.py
+Resource   common.robot
+
+Variables    vars.py
+
+Suite Setup    Launch NRF CN With PCF HTTP1
+Suite Teardown    Suite Teardown Default
+
+Test Setup    Test Setup With Gnbsim
+Test Teardown    Test Teardown With Gnbsim
+
+*** Test Cases ***
+
+Attach and Ping HTTP1
+    [Tags]    AMF  SMF  UDM  NRF  UDR  AUSF  UPF  PCF
+    Start Gnbsim    ${GNBSIM_IN_USE}
+    ${ip} =   Check Gnbsim IP    ${GNBSIM_IN_USE}
+
+    Ping From Gnbsim    ${GNBSIM_IN_USE}  ${EXT_DN1_IP}