Strip whitespace from BatchInvitationUser email & organisation_slug #1053

Job	Run time
Test Ruby	10m 40s
Security Analysis / Run Brakeman	12s
Lint Ruby / Run RuboCop	16s
Lint JavaScript / Run Standardx	12s
Test JavaScript / Run Jasmine	1m 15s
Lint SCSS / Run Stylelint	14s
	12m 49s

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