Add -l/--log-level option. Honor __cdist_loglevel env var. (#572)

Add -l/--log-level option, __cdist_loglevel -> __cdist_log_level; honor __cdist_log_level env var

cdist/conf/type/__install_config/gencode-local

@@ -22,27 +22,10 @@ chroot="$(cat "$__object/parameter/chroot")"
 remote_exec="$__type/files/remote/exec"
 remote_copy="$__type/files/remote/copy"
 
-cdist_args=""
-case "$__cdist_loglevel" in
-   INFO)
-      cdist_args="-v"
-   ;;
-   VERBOSE)
-      cdist_args="-vv"
-   ;;
-   DEBUG)
-      cdist_args="-vvv"
-   ;;
-   TRACE)
-      cdist_args="-vvvv"
-   ;;
-esac
-
 cat << DONE
 export __default_remote_exec="$__remote_exec"
 export __default_remote_copy="$__remote_copy"
 cdist config \
-   $cdist_args \
    --remote-exec="$remote_exec $chroot" \
    --remote-copy="$remote_copy $chroot" \
    $__target_host

cdist/conf/type/__install_stage/gencode-remote

@@ -22,7 +22,7 @@ uri="$(cat "$__object/parameter/uri" 2>/dev/null \
    || echo "$__object_id")"
 target="$(cat "$__object/parameter/target")"
 
-case "$__cdist_loglevel" in
+case "$__cdist_log_level" in
     DEBUG|TRACE)
         curl="curl"
         tar="tar -xvzp"