BS-6729
Fix validator, add "<" and ">" as invalid characters for a filename

Conflicts:
	bundles/plugins/org.bonitasoft.studio.common.repository/src/org/bonitasoft/studio/common/repository/operation/ImportBosArchiveOperation.java
	bundles/plugins/org.bonitasoft.studio.common/src/org/bonitasoft/studio/common/jface/databinding/validator/URLEncodableInputValidator.java
	bundles/plugins/org.bonitasoft.studio.validators/src/org/bonitasoft/studio/validators/repository/URLValidatorDescriptorFileStore.java
	bundles/plugins/org.bonitasoft.studio.validators/src/org/bonitasoft/studio/validators/repository/ValidatorDescriptorFileStore.java