update mysqltest and change the owner of some cases

tools/deploy/mysql_test/test_suite/expr/t/expr_floor.test

@@ -1,7 +1,7 @@
 --disable_query_log
 set @@session.explicit_defaults_for_timestamp=off;
 --enable_query_log
-#### owner: yuchen.wyc
+#### owner: xiaoyi.xy
 #### owner group: sql3
 #### description: 测试地板函数（向下取整函数，高斯函数）
 #/--disableabortonerror/

tools/deploy/mysql_test/test_suite/expr/t/expr_instr.test

@@ -1,7 +1,7 @@
 --disable_query_log
 set @@session.explicit_defaults_for_timestamp=off;
 --enable_query_log
-#### owner: yuchen.wyc
+#### owner: jim.wjh
 #### owner group: sql3
 #### description: 测试instr函数
 # tags: expr, datatype

tools/deploy/mysql_test/test_suite/expr/t/expr_locate.test

@@ -1,7 +1,7 @@
 --disable_query_log
 set @@session.explicit_defaults_for_timestamp=off;
 --enable_query_log
-#### owner: yuchen.wyc
+#### owner: xiaoyi.xy
 #### owner group: sql3
 #### description: 测试locate函数
 # tags: expr, datatype

tools/deploy/mysql_test/test_suite/expr/t/expr_nseq.test

@@ -1,7 +1,7 @@
 --disable_query_log
 set @@session.explicit_defaults_for_timestamp=off;
 --enable_query_log
-#### owner: yuchen.wyc
+#### owner: xiaoyi.xy
 #### owner group: sql3
 #### description: 测试<＝>运算符
 --disable_warnings

tools/deploy/mysql_test/test_suite/expr/t/expr_position.test

@@ -1,7 +1,7 @@
 --disable_query_log
 set @@session.explicit_defaults_for_timestamp=off;
 --enable_query_log
-#### owner: yuchen.wyc
+#### owner: jim.wjh
 #### owner group: sql3
 #### description: 测试position函数
 --echo ================ expression position ================

tools/deploy/mysql_test/test_suite/expr/t/func_equal.test

@@ -1,7 +1,7 @@
 --disable_query_log
 set @@session.explicit_defaults_for_timestamp=off;
 --enable_query_log
-#### owner: yuchen.wyc
+#### owner: peihan.dph
 #### owner group: sql3
 #### description: 测试相等比较运算符
 # Initialise