Required fields marked as optional

[amanshu]

https://geobrowsertest.satapps.org/docs/xml_ns0_credentials.html:

• The username and password fields have a 'min/max occurs' of 0/1. This should be 1/1.

https://geobrowsertest.satapps.org/docs/xml_ns0_searchRequest.html:

• The aoiWKT, start and stop fields have a 'min/max occurs' of 0/1. This should be 1/1.

[raul-geocento]

Corrected and deployed in testing.