[TD-2643,TD-2925]<fix>: update sim test case and JDBCDemo doc

tests/examples/JDBC/JDBCDemo/README-jdbc-windows.md

@@ -137,7 +137,7 @@ Welcome to the TDengine shell from Linux, Client Version:2.0.1.1
 Copyright (c) 2017 by TAOS Data, Inc. All rights reserved.
 
 taos> show databases;
-              name              |      created_time       |   ntables   |   vgroups   | replica | quorum |  days  |    keep1,keep2,keep(D)     |  cache(MB)  |   blocks    |   minrows   |   maxrows   | wallevel |    fsync    | comp | precision |    status    |
+              name              |      created_time       |   ntables   |   vgroups   | replica | quorum |  days  |    keep0,keep1,keep(D)     |  cache(MB)  |   blocks    |   minrows   |   maxrows   | wallevel |    fsync    | comp | precision |    status    |
 ===================================================================================================================================================================================================================================================================
  test                           | 2020-08-19 18:43:50.731 |           1 |           1 |       1 |      1 |      2 | 3650,3650,3650             |          16 |           6 |         100 |        4096 |        1 |        3000 |    2 | ms        | ready        |
  log                            | 2020-08-19 18:40:28.064 |           4 |           1 |       1 |      1 |     10 | 30,30,30                   |           1 |           3 |         100 |        4096 |        1 |        3000 |    2 | us        | ready        |

tests/script/general/http/restful_full.sim

@@ -88,7 +88,7 @@ print ===============  step2 - no db
 #11
 system_content curl -H 'Authorization: Taosd /KfeAzX/f9na8qdtNZmtONryp201ma04bEl8LcvLUd7a8qdtNZmtONryp201ma04'  -d 'show databases' 127.0.0.1:7111/rest/sql
 print 11-> $system_content
-if $system_content != @{"status":"succ","head":["name","created_time","ntables","vgroups","replica","quorum","days","keep1,keep2,keep(D)","cache(MB)","blocks","minrows","maxrows","wallevel","fsync","comp","cachelast","precision","update","status"],"data":[],"rows":0}@ then
+if $system_content != @{"status":"succ","head":["name","created_time","ntables","vgroups","replica","quorum","days","keep0,keep1,keep(D)","cache(MB)","blocks","minrows","maxrows","wallevel","fsync","comp","cachelast","precision","update","status"],"data":[],"rows":0}@ then
   return -1
 endi