Simple bug fix to add command line options to nginx configtest.

Added $OPTIONS to nginx test functions. If options were defined, they
were not applied to configtest.

In cases that require command line options, config test would fail.
For ALL cases that define options, the configuration tested is not the
configuration that the agent attempts to start.
Merge pull request #388 from ctrahman/master

Simple bug fix to add command line options to nginx configtest.