Correct authFormParams parameter loading

[mattbucci]

This is relevant to #434
I couldn't get formAuthentication to pass additional form params correctly

I made a simple script containing

<?php var_dump($_POST); die(); ?>

website: 2021-01-14 18:50:28 INFO - Performing FORM authentication at "https://example.com/test.php" (username=username; password=*****)
website: 2021-01-14 18:50:28 INFO - Authentication status: HTTP/1.1 200 OK
website: 2021-01-14 18:50:28 DEBUG - Authentication response:
array(2) {
["username"]=>
string(8) "username"
["pass"]=>
string(8) "password"
}

I've tried both 2.8.1 and 2.9.1 but the authFormParams field doesn't seem to do anything

my config looks like

 <httpClientFactory class="com.norconex.collector.http.client.impl.GenericHttpClientFactory">
        <cookiesDisabled>false</cookiesDisabled>
        <maxRedirects>5</maxRedirects>
        <connectionTimeout>60000</connectionTimeout>
        <authFormCharset>UTF-8</authFormCharset>
        <authMethod>form</authMethod>
        <authURL>https://example.com/test.php</authURL>
        <authUsername>username</authUsername>
        <authPassword>password</authPassword>
        <authUsernameField>username</authUsernameField>
        <authPasswordField>pass</authPasswordField>
        <authFormParams>
          <param name="test">test</param>
        </authFormParams>
      </httpClientFactory>

After this change my response looks like

website: 2021-01-14 19:32:29 DEBUG - Authentication response:
array(3) {
 ["username"]=>
 string(8) "username"
 ["pass"]=>
 string(8) "password"
 ["test"]=>
 string(4) "test"
}

[essiembre]

I just made a new snapshot release with this fix. Thank you!