Changed mysql-test to print warnings for not existing table to DROP TABLE

Cleaned up test; Removed wrong DROP TABLE commands and use standard table and database names.
changed store_warning() -> push_warning_print()

mysql-test/t/func_timestamp.test

@@ -2,7 +2,10 @@
 # Tests that depend on the timestamp and the TZ variable
 #
 
+--disable_warnings
 drop table if exists t1;
+--enable_warnings
+
 create table t1 (Zeit time, Tag tinyint not null, Monat tinyint not null,
 Jahr smallint not null, index(Tag), index(Monat), index(Jahr) );
 insert into t1 values ("09:26:00",16,9,1998),("09:26:00",16,9,1998);