test: Pass -maxdepth 1 when running find in methods dir

This fixes a test failures in the cmake branch which contains
sub directories in the methods output dir.

test/integration/test-apt-update-failure-propagation

@@ -16,7 +16,7 @@ rm "$NEWMETHODS"
 mkdir "$NEWMETHODS"
 backupIFS="$IFS"
 IFS="$(printf "\n\b")"
-for METH in $(find "$OLDMETHODS" ! -type d); do
+for METH in $(find "$OLDMETHODS" -maxdepth 1 ! -type d); do
 	ln -s "$OLDMETHODS/$(basename "$METH")" "$NEWMETHODS"
 done
 IFS="$backupIFS"

test/integration/test-bug-738785-switch-protocol

@@ -45,7 +45,7 @@ rm "$NEWMETHODS"
 mkdir "$NEWMETHODS"
 backupIFS="$IFS"
 IFS="$(printf "\n\b")"
-for METH in $(find "$OLDMETHODS" ! -type d); do
+for METH in $(find "$OLDMETHODS" -maxdepth 1 ! -type d); do
 	ln -s "$OLDMETHODS/$(basename "$METH")" "$NEWMETHODS"
 done
 IFS="$backupIFS"

test/integration/test-different-methods-for-same-source

@@ -17,7 +17,7 @@ rm "$NEWMETHODS"
 mkdir "$NEWMETHODS"
 backupIFS="$IFS"
 IFS="$(printf "\n\b")"
-for METH in $(find "$OLDMETHODS" ! -type d); do
+for METH in $(find "$OLDMETHODS" -maxdepth 1 ! -type d); do
 	ln -s "$OLDMETHODS/$(basename "$METH")" "$NEWMETHODS"
 done
 IFS="$backupIFS"