coverity: replace python with jq

Judging by https://travis-ci.org/systemd/systemd/jobs/604425785
(where the script failed with "tools/coverity.sh: line 45: python: command not found")
python-unversioned-command is no longer installed by default with python2.
Given that it's not the first time python has vanished and it's not clear
what exactly should be installed to make sure it's there, let's just use jq instead.

tools/coverity.sh

@@ -42,11 +42,11 @@ if [ "$AUTH_RES" = "Access denied" ]; then
     echo -e "\033[33;1mCoverity Scan API access denied. Check COVERITY_SCAN_PROJECT_NAME and COVERITY_SCAN_TOKEN.\033[0m"
     exit 1
 else
-    AUTH=`echo $AUTH_RES | python -c "import sys, json; print(json.load(sys.stdin)['upload_permitted'])"`
-    if [ "$AUTH" = "True" ]; then
+    AUTH=`echo $AUTH_RES | jq .upload_permitted`
+    if [ "$AUTH" = "true" ]; then
         echo -e "\033[33;1mCoverity Scan analysis authorized per quota.\033[0m"
     else
-        WHEN=`echo $AUTH_RES | python -c "import sys, json; print(json.load(sys.stdin)['next_upload_permitted_at'])"`
+        WHEN=`echo $AUTH_RES | jq .next_upload_permitted_at`
         echo -e "\033[33;1mCoverity Scan analysis NOT authorized until $WHEN.\033[0m"
         exit 1
     fi

travis-ci/managers/fedora.sh

@@ -16,7 +16,7 @@ DOCKER_EXEC="${DOCKER_EXEC:-docker exec -it $CONT_NAME}"
 DOCKER_RUN="${DOCKER_RUN:-docker run}"
 REPO_ROOT="${REPO_ROOT:-$PWD}"
 ADDITIONAL_DEPS=(dnf-plugins-core
-                 python2 iputils
+                 jq iputils
                  hostname libasan
                  python3-pyparsing
                  python3-evdev