multiple-pipeline-capture/playback wrappers preserve SCRIPT_NAME

This fixes 1398cf4 which broke logging by moving the logs of both
tests into the same logs/multiple-pipeline/ directory

Signed-off-by: Marc Herbert <marc.herbert@intel.com>

Author: marc-hb

case-lib/lib.sh

@@ -4,8 +4,11 @@
 SCRIPT_HOME="$(dirname "$0")"
 # get test-case parent folder name
 SCRIPT_HOME=$(cd "$SCRIPT_HOME/.." && pwd)
+
+# Let some wrappers override this if they want
 # shellcheck disable=SC2034 # external script can use it
-SCRIPT_NAME="$0"  # get test-case script load name
+: "${SCRIPT_NAME:="$0"}"  # get test-case script load name
+
 # shellcheck disable=SC2034 # external script can use it
 SCRIPT_PRAM="$*"  # get test-case parameter
 

test-case/multiple-pipeline-capture.sh

@@ -5,4 +5,5 @@ set -e
 TESTDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)
 
 # Need "exec" otherwise it believes to be a Sub-Test
+export SCRIPT_NAME="$0"
 exec "$TESTDIR"/test-case/multiple-pipeline.sh -f c "$@"

test-case/multiple-pipeline-playback.sh

@@ -5,4 +5,5 @@ set -e
 TESTDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)
 
 # Need "exec" otherwise it believes to be a Sub-Test
+export SCRIPT_NAME="$0"
 exec "$TESTDIR"/test-case/multiple-pipeline.sh -f p "$@"