Explain JDBC errors better
Explain JDBC errors better

git-svn-id: https://svn.apache.org/repos/asf/jakarta/jmeter/trunk@738637 13f79535-47bb-0310-9956-ffa450edef68

Former-commit-id: 0000869ef62ef6053fe47ff88a36a7dcf2133c39
etnetera/jmeter,ham1/jmeter,apache/jmeter,etnetera/jmeter,apache/jmeter,ham1/jmeter,apache/jmeter,apache/jmeter,benbenw/jmeter,etnetera/jmeter,benbenw/jmeter,apache/jmeter,benbenw/jmeter,ham1/jmeter,ham1/jmeter,etnetera/jmeter,benbenw/jmeter,etnetera/jmeter,ham1/jmeter