Fix issue #618.

Router throws an exception when parsing multiple default string
arguments because CSV treats leading whitespace as significant causing
the second argument to be parsed as ` "Test2"`, which is a non-quoted
field. This commit sets a flag in the reader to trim the whitespace
before parsing the second parameter.
Add test to check whitespace between fixed params
Merge pull request #621 from ianonavy/bugfix/router-csv-error

Bugfix/router csv error