test: nginx: Increses the timeout while reading the audit log.

Audit logs are taking too long to be written on the disk. One of the
consequence of that is to have tests that demands to read from audit
log failing. Increase the timeout makes it wait a little bit more for
the logs before gave up.
test: disabling: SecAuditLogType Concurrent

The test is making usage of a custom script, which is not functional in
in Nginx due to timing issues. Disabling it for now until we came up
with a solution that works for every port/version.
test: nginx: Adds missing environment variables.

Added the following environment variables:
 - DATA_DIR
 - TEMP_DIR
 - UPLOAD_DIR
These were needed by the testing framework, as the name explains.