test: Reset PS env vars in test environment

Signed-off-by: Jacques de Laval <jacques@de-laval.se>

test/testenv_exec.sh

@@ -17,6 +17,11 @@ nsenter=$(which nsenter)
 chroot=$(which chroot)
 
 export PATH=/sbin:/bin
+export PS1='\w \$ '
+export PS2='> '
+export PS3='#? '
+export PS4='+ '
+
 "$nsenter" \
     --preserve-credentials \
     --user \

test/testenv_start.sh

@@ -10,9 +10,14 @@ TESTS_ROOT="$(pwd)/${TEST_DIR}/test_root"
 unshare=$(which unshare)
 chroot=$(which chroot)
 
+export PATH=/sbin:/bin
+export PS1='\w \$ '
+export PS2='> '
+export PS3='#? '
+export PS4='+ '
+
 # Not supported by Busybox unshare:
 #  --cgroup --time
-export PATH=/sbin:/bin
 exec "$unshare" \
     --user --map-root-user \
     --fork --pid --mount-proc \