Merge stable to master: v0.1.3-rc1

[junsk1]

• Changed datacite output according to comments

• CSCMETAX-61: [REF] Update requirements.txt. Brings about a warning about gevent monkey-patching, but according to SSLContext infinite recursion in Python 3.6 gevent/gevent#1016 should not affect since we do not import gevent in the code.

• CSCMETAX-379:[ADD] special handling of syke datasets for urnresolver

• Update syke.py

• CSCMETAX-61: [REF] Refactor modifying the Request object in CommonViewSet to be more sensible

• CSCMETAX-393: [ADD] Add permission class ServicePermissions, which reads app_config and controls general read and write access for services per each api

• CSCMETAX-401:[ADD] more data to the oai_dc metadataformat output

• Update minimal_api.py

• CSCMETAX-359: [ADD] research_dataset.relation.entity.type value is auto-populated from resource_type reference data, if given. Adjust test data and tests accordingly.

• CSCMETAX-394: [ADD] Remove sensitive fields from datasets apis

• CSCMETAX-61: [FIX] Restrict /datasets/pid/files from public

• CSCMETAX-407: [ADD] Query parameter to filter datasets by field metadata_owner_org

• CSCMETAX-398: [ADD] Datasets api: Allow the first addition of files to an empty dataset to occur without creating a new dataset version (update from 0 files to N files)

• CSCMETAX-61: [REF] Change Travis deploy user

• CSCMETAX-400: [ADD] Datasets api: Add query param ?migration_override=bool which enables passing a custom preferred_identifier when creating datasets

• CSCMETAX-395: [FIX] Datasets api /datasets/pid/files now also supports ?file_fields=x,y,z parameter

• CSCMETAX-394: [ADD] Remove sensitive fields (email, phone, telephone) from OAI-PMH api outputs

• CSCMETAX-394: [FIX] Uncomment the part that does the actual cleaning... In tests, search for known sensitive values instead of field names

• CSCMETAX-61: [FIX] Try a fix to an error in initial data loading during travis deployment

• CSCMETAX-408: [ADD] Remove exclusion of migrations/ directory from .gitignore. Generate first migration files. Fix .flake8 to ignore migrations/ directory since there are files that are autogenerated

• Schema changes required by the Etsin migration.

• Etsim migration related schema changes (part2)

• CSCMETAX-280:[ADD] datacatalog harvesting

• Update minimal_api.py

• CSCMETAX-406: [REF] Update data catalog and dataset schemas

• CSCMETAX-280:[FIX] according to review comments.

• CSCMETAX-280:[FIX] proper handling of language field data.

• CSCMETAX-280:[FIX] proper handling of language field data.

• CSCMETAX-406: [REF] Update data catalog and dataset schemas

• CSCMETAX-406: [REF] Update test data to comform with latest schema changes (description field cardinality change, some other)

• CSCMETAX-406: [FIX] OAI-PMH tests after schema updates

• CSCMETAX-280:[ADD] limit for metadata prefixes for datacatalog set.

• CSCMETAX-406: [ADD] Update data catalog and production catalog schemas also