Ensure proper JSON in keystone bootstrap

This fixes the issue when keystone-manage output included
backslashes and/or double quotation marks which broke JSON string.

Change-Id: Ifae18c407210c12745d29fc4c95dca69aeafe6a8
Closes-bug: #1866017
(cherry picked from commit 33d184a)

Author: yoctozepto

docker/keystone/keystone/keystone_bootstrap.sh

@@ -33,7 +33,9 @@ function exit_json {
 changed="false"
 # NOTE(mgoddard): pipe through cat -v to remove unprintable control characters
 # which prevent JSON decoding.
-keystone_bootstrap=$(keystone-manage bootstrap --bootstrap-username "${USERNAME}" --bootstrap-password "${PASSWORD}" --bootstrap-project-name "${PROJECT}" --bootstrap-role-name "${ROLE}" --bootstrap-admin-url "${ADMIN_URL}" --bootstrap-internal-url "${INTERNAL_URL}" --bootstrap-public-url "${PUBLIC_URL}" --bootstrap-service-name "keystone" --bootstrap-region-id "${REGION}" 2>&1 | cat -v)
+# NOTE(yoctozepto): also apply sed to escape double quotation marks
+# and backslashes
+keystone_bootstrap=$(keystone-manage bootstrap --bootstrap-username "${USERNAME}" --bootstrap-password "${PASSWORD}" --bootstrap-project-name "${PROJECT}" --bootstrap-role-name "${ROLE}" --bootstrap-admin-url "${ADMIN_URL}" --bootstrap-internal-url "${INTERNAL_URL}" --bootstrap-public-url "${PUBLIC_URL}" --bootstrap-service-name "keystone" --bootstrap-region-id "${REGION}" 2>&1 | cat -v | sed 's/\\/\\\\/g' | sed 's/"/\\"/g')
 if [[ $? != 0 ]]; then
     fail_json "${keystone_bootstrap}"
 fi

releasenotes/notes/bug-1866017-9e31ddbfca9fd0f4.yaml

@@ -0,0 +1,5 @@
+---
+fixes:
+  - |
+    Keystone bootstrap could produce invalid json.
+    `LP#1866017 <https://launchpad.net/bugs/1866017>`__