Re-introduce session id

src/jat.sh.skel

         msgs+=("fatal: $msg")
     done
     jat__log_error "${msgs[@]}"
+    jat__sfinish
     die "${msgs[@]}"
 }
 
     local reload=false
     local old_test_id
     local old_test_version
+    local sessid
     mkdir -p "$JAT__DIR" \
      || die "could not initialize JAT__DIR: $JAT__DIR"
     __JAT__SDIR=$JAT__DIR/session
     export JAT__YLOG
     debug -v reload __JAT__SDIR
     if $reload; then
+        sessid=$(__jat__sd_keyr sessid)
         old_test_id=$(__jat__sd_keyr test_id)
         old_test_version=$(__jat__sd_keyr test_version)
         test "$old_test_id" == "$JAT__TEST_ID" || {
             "JAT__VERSION=$__JAT__SELF_VERSION"
         __jat__show_sinitr
     else
+        sessid=$(__jat__newsid)
         debug -v __JAT__SDIR JAT__YLOG
         {
             echo "---"
             echo "    id: $JAT__TEST_ID"
             echo "    version: $JAT__TEST_VERSION"
             echo "start: $(__jat__newstamp)"
+            echo "id: $sessid"
             echo "events:"
         } | __jat__writelog
+        __jat__sd_keyw sessid "$sessid"
         __jat__sd_keyw test_id "$JAT__TEST_ID"
         __jat__sd_keyw test_version "$JAT__TEST_VERSION"
         __jat__pdummy
     esac
 }
 
+__jat__newsid() {
+    #
+    # Create new timestamp
+    #
+    case $__JAT__DETERMINISTIC in
+        true)   echo noid ;;
+        false)  date +%s-%N ;;
+        *) die "bad value of __JAT__DETERMINISTIC: $__JAT__DETERMINISTIC" ;;
+    esac
+}
+
 __jat__pdummy() {
     #
     # Create dummy phase

tests/basic/oracle/ylog_both.stdout

     id: _jat_anon_test_
     version: _jat_no_test_version_
 start: time-1
+id: noid
 events:
     -
         etype: SESSION.START

tests/basic/oracle/ylog_fail.stdout

     id: _jat_anon_test_
     version: _jat_no_test_version_
 start: time-1
+id: noid
 events:
     -
         etype: SESSION.START

tests/basic/oracle/ylog_pass.stdout

     id: _jat_anon_test_
     version: _jat_no_test_version_
 start: time-1
+id: noid
 events:
     -
         etype: SESSION.START