Rst 6754 (#1639)

* (RST-6754) Welsh support for new pdf

* (RST-6754) Corrected full system environment variables to include smtp username and password

.env.full_system.common

@@ -18,3 +18,5 @@ SENDING_HOST=et1.et.127.0.0.1.nip.io
 SERVICE_NOW_EMAIL=fake@servicenow.fake.com
 SMTP_HOSTNAME=mailhog
 SMTP_PORT=1025
+SMTP_USERNAME=doesntmatter
+SMTP_PASSWORD=doesntmatter

config/locales/cy/diversities/identity.cy.yml

@@ -20,7 +20,7 @@ cy:
           no_answer: Nac ydi
           prefer-not-to-say: Mae'n well gen i beidio dweud
       sexual_identity:
-        label: Which of the options below best describes your sexual identity?
+        label: Pa un o'r opsiynau isod sy'n disgrifio orau eich hunaniaeth rywiol?
         options:
           heterosexual-straight: Heterorywiol
           gay-lesbian: Hoyw / Lesbiaidd