TT#29620 Clean TAP test warning: CREDS appears unused [SC2034]

The variable $CREDS is necessary for /usr/share/ngcp-panel-tools/ngcp-api.inc
so we need to pass it explicetly to prevent shellcheck warnings here.

Change-Id: Ic26425bab6b7f4b71aa267db3ec897245753b64d

tools/ngcp-api.inc

@@ -3,6 +3,13 @@
 set -e
 
 importcreds () {
+  local CREDS=$1
+
+  if [ -z "${CREDS}" ]; then
+    echo "Error: missing mandatory file name to read" >&2
+    exit 1
+  fi
+
   if [ ! -f "${CREDS}" ]; then
     return
   fi

tools_bin/ngcp-api-delete

@@ -19,7 +19,7 @@ EOF
 if [ -z "$APIUSER" ] ; then
 	if [ -f "$TOOLS" ] ; then
 		source "$TOOLS"
-		importcreds
+		importcreds "$CREDS"
 	else
 		APIUSER="administrator:administrator"
 	fi

tools_bin/ngcp-api-get

@@ -19,7 +19,7 @@ EOF
 if [ -z "$APIUSER" ] ; then
 	if [ -f "$TOOLS" ] ; then
 		source "$TOOLS"
-		importcreds
+		importcreds "$CREDS"
 	else
 		APIUSER="administrator:administrator"
 	fi

tools_bin/ngcp-api-patch

@@ -21,7 +21,7 @@ EOF
 if [ -z "$APIUSER" ] ; then
   if [ -f "$TOOLS" ] ; then
     source "$TOOLS"
-    importcreds
+    importcreds "$CREDS"
   else
     APIUSER="administrator:administrator"
   fi

tools_bin/ngcp-api-post

@@ -20,7 +20,7 @@ EOF
 if [ -z "$APIUSER" ] ; then
 	if [ -f "$TOOLS" ] ; then
 		source "$TOOLS"
-		importcreds
+		importcreds "$CREDS"
 	else
 		APIUSER="administrator:administrator"
 	fi

tools_bin/ngcp-api-put

@@ -20,7 +20,7 @@ EOF
 if [ -z "$APIUSER" ] ; then
   if [ -f "$TOOLS" ] ; then
     source "$TOOLS"
-    importcreds
+    importcreds "$CREDS"
   else
     APIUSER="administrator:administrator"
   fi