tests/bsim/bluetooth/audio: Use common scripts

Use the common functions instead of
replicating functionality and do a minor cleanup

Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>
diff --git a/tests/bsim/bluetooth/audio/test_scripts/bap_bass_server_sync_client_rem.sh b/tests/bsim/bluetooth/audio/test_scripts/bap_bass_server_sync_client_rem.sh
index a20060b..1cbdbd0 100755
--- a/tests/bsim/bluetooth/audio/test_scripts/bap_bass_server_sync_client_rem.sh
+++ b/tests/bsim/bluetooth/audio/test_scripts/bap_bass_server_sync_client_rem.sh
@@ -1,26 +1,12 @@
 #!/usr/bin/env bash
-#
 # Copyright (c) 2020-2022 Nordic Semiconductor ASA
 #
 # SPDX-License-Identifier: Apache-2.0
 
+source ${ZEPHYR_BASE}/tests/bsim/sh_common.source
+
 SIMULATION_ID="bass_server_sync_client_rem"
 VERBOSITY_LEVEL=2
-PROCESS_IDS=""; EXIT_CODE=0
-
-function Execute(){
-  if [ ! -f $1 ]; then
-    echo -e "  \e[91m`pwd`/`basename $1` cannot be found (did you forget to\
- compile it?)\e[39m"
-    exit 1
-  fi
-  timeout 20 $@ & PROCESS_IDS="$PROCESS_IDS $!"
-}
-
-: "${BSIM_OUT_PATH:?BSIM_OUT_PATH must be defined}"
-
-#Give a default value to BOARD if it does not have one yet:
-BOARD="${BOARD:-nrf52_bsim}"
 
 cd ${BSIM_OUT_PATH}/bin
 
@@ -34,15 +20,11 @@
   -v=${VERBOSITY_LEVEL} -s=${SIMULATION_ID} -d=1 \
   -testid=bap_broadcast_assistant_server_sync_client_rem -rs=46 -D=3
 
-  Execute ./bs_${BOARD}_tests_bsim_bluetooth_audio_prj_conf \
+Execute ./bs_${BOARD}_tests_bsim_bluetooth_audio_prj_conf \
   -v=${VERBOSITY_LEVEL} -s=${SIMULATION_ID} -d=2 -testid=bass_broadcaster -rs=69 -D=3
 
 # Simulation time should be larger than the WAIT_TIME in common.h
 Execute ./bs_2G4_phy_v1 -v=${VERBOSITY_LEVEL} -s=${SIMULATION_ID} -D=3 \
   -sim_length=60e6 $@
 
-for PROCESS_ID in $PROCESS_IDS; do
-  wait $PROCESS_ID || let "EXIT_CODE=$?"
-done
-
-exit $EXIT_CODE #the last exit code != 0
+wait_for_background_jobs
diff --git a/tests/bsim/bluetooth/audio/test_scripts/bap_bass_server_sync_server_rem.sh b/tests/bsim/bluetooth/audio/test_scripts/bap_bass_server_sync_server_rem.sh
index 65dedab..c4bd2f6 100755
--- a/tests/bsim/bluetooth/audio/test_scripts/bap_bass_server_sync_server_rem.sh
+++ b/tests/bsim/bluetooth/audio/test_scripts/bap_bass_server_sync_server_rem.sh
@@ -1,26 +1,11 @@
 #!/usr/bin/env bash
-#
 # Copyright (c) 2020-2022 Nordic Semiconductor ASA
 #
 # SPDX-License-Identifier: Apache-2.0
+source ${ZEPHYR_BASE}/tests/bsim/sh_common.source
 
 SIMULATION_ID="bass_server_sync_server_rem"
 VERBOSITY_LEVEL=2
-PROCESS_IDS=""; EXIT_CODE=0
-
-function Execute(){
-  if [ ! -f $1 ]; then
-    echo -e "  \e[91m`pwd`/`basename $1` cannot be found (did you forget to\
- compile it?)\e[39m"
-    exit 1
-  fi
-  timeout 20 $@ & PROCESS_IDS="$PROCESS_IDS $!"
-}
-
-: "${BSIM_OUT_PATH:?BSIM_OUT_PATH must be defined}"
-
-#Give a default value to BOARD if it does not have one yet:
-BOARD="${BOARD:-nrf52_bsim}"
 
 cd ${BSIM_OUT_PATH}/bin
 
@@ -34,15 +19,11 @@
   -v=${VERBOSITY_LEVEL} -s=${SIMULATION_ID} -d=1 \
   -testid=bap_broadcast_assistant_server_sync_server_rem -rs=46 -D=3
 
-  Execute ./bs_${BOARD}_tests_bsim_bluetooth_audio_prj_conf \
+Execute ./bs_${BOARD}_tests_bsim_bluetooth_audio_prj_conf \
   -v=${VERBOSITY_LEVEL} -s=${SIMULATION_ID} -d=2 -testid=bass_broadcaster -rs=69 -D=3
 
 # Simulation time should be larger than the WAIT_TIME in common.h
 Execute ./bs_2G4_phy_v1 -v=${VERBOSITY_LEVEL} -s=${SIMULATION_ID} -D=3 \
   -sim_length=60e6 $@
 
-for PROCESS_ID in $PROCESS_IDS; do
-  wait $PROCESS_ID || let "EXIT_CODE=$?"
-done
-
-exit $EXIT_CODE #the last exit code != 0
+wait_for_background_jobs