fix return value for test shell scripts

apps/wolfsshd/test/error_return.sh

@@ -13,7 +13,7 @@ PUBLIC_KEY="./keys/hansel-key-ecc.pub"
 if [ -z "$1" ] || [ -z "$2" ]; then
     echo "expecting host and port as arguments"
     echo "./error_return.sh 127.0.0.1 22222"
-    exit -1
+    exit 1
 fi
 
 echo "$TEST_CLIENT -c 'bash -c \"(exit 2)\"' -u $USER -i $PRIVATE_KEY -j $PUBLIC_KEY -h \"$1\" -p \"$2\""

apps/wolfsshd/test/sshd_exec_test.sh

@@ -13,7 +13,7 @@ PUBLIC_KEY="./keys/hansel-key-ecc.pub"
 if [ -z "$1" ] || [ -z "$2" ]; then
     echo "expecting host and port as arguments"
     echo "./sshd_exec_test.sh 127.0.0.1 22222"
-    exit -1
+    exit 1
 fi
 
 set -e

apps/wolfsshd/test/sshd_forcedcmd_test.sh

@@ -5,7 +5,7 @@
 if [ -z "$1" ] || [ -z "$2" ]; then
     echo "expecting host and port as arguments"
     echo "./sshd_exec_test.sh 127.0.0.1 22222"
-    exit -1
+    exit 1
 fi
 
 PWD=`pwd`
@@ -42,7 +42,7 @@ cat $RESULT | grep bob
 RESULT=$?
 if [ "$RESULT" == 0 ]; then
     echo "Shell login should fail with forced command"
-    exit -1
+    exit 1
 fi
 
 set -e

apps/wolfsshd/test/sshd_x509_test.sh

@@ -8,7 +8,7 @@ cd ../../..
 if [ -z "$1" ] || [ -z "$2" ] || [ -z "$3" ]; then
     echo "expecting host, port and user as arguments"
     echo "./sshd_x509_text.sh 127.0.0.1 22222 user"
-    exit -1
+    exit 1
 fi
 
 TEST_CLIENT="./examples/client/client"