RFR: 8263509: LdapSchemaParser.readNextTag checks array length incorrectly

[Aleksey Shipilev]

SonarCloud rightfully says:
  The length of "values" is always ">=0", so update this test to either "==0" or ">0".

        // make sure at least one value was returned
        if(values.length < 0) { // <--- here
            throw new InvalidAttributeValueException("no values for " +
                                                     "attribute "" +
                                                     tagName + """);
        }

There is a subsequent access to values[0], which means the failure would throw `AIOOB`, not `InvalidAttributeValueException`.

Additional testing:
 - [x] Linux x86_64 fastdebug, `com/sun/jndi`

-------------

Commit messages:
 - 8263509: LdapSchemaParser.readNextTag checks array length incorrectly

Changes: https://git.openjdk.java.net/jdk/pull/2968/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2968&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8263509
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2968.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2968/head:pull/2968

PR: https://git.openjdk.java.net/jdk/pull/2968