Release: merge 'develop' into 'master' created by Jürgen Hannus

See merge request teis/files-service!45

TEIS-1810: replaced correlateAll() with correlate(), PollVirusScanResultTask is now asynchronous after in bpmn model

Release: merge 'develop' into 'master' created by Enriko Käsper

See merge request teis/files-service!44

TEIS-1725: refactored code so that there is a single listener which sends out messages to calculate checksum and create thumbnail on file update

TEIS-1725: functionality to skip updating thumbnails if thumbnail creating for that file has already been performed (even if unsuccessful)

# Conflicts:
#	service/src/main/java/ee/sm/ti/teis/file/UpdateFilesHashJob.java
#	service/src/main/java/ee/sm/ti/teis/file/config/FilesQueueConfig.java
#	service/src/main/java/ee/sm/ti/teis/file/hash/FileHashMsListener.java
#	service/src/main/java/ee/sm/ti/teis/file/hash/FileHashService.java
#	service/src/main/java/ee/sm/ti/teis/file/virusscan/bpm/UploadFileVirusScanTask.java
#	service/src/main/resources/application.yaml
#	service/src/test/java/ee/sm/ti/teis/file/service/ThumbnailGeneratorTest.java

Resolve TEIS-1725 "Hash"

Closes TEIS-1725

See merge request teis/files-service!43

TEIS-1584: [wip] functionality to call files-virus-scan-service to initiate file virus scan via external service. Updated checksum calculation with file stream method instead of reading byte array into application memory

# Conflicts:
#	service/src/test/java/ee/sm/ti/teis/file/service/ThumbnailGeneratorTest.java

TEIS-1725: file checksum calculation logic moved to another micro service project and therefore changes to files service

Resolve TEIS-1584 "Scan status polling"

Closes TEIS-1584

See merge request teis/files-service!41

TEIS-1584: [wip] functionality to call files-virus-scan-service to initiate file virus scan via external service. Updated checksum calculation with file stream method instead of reading byte array into application memory

TEIS-1725: updated Camunda flow to handle system and connection error differently from business exceptions

TEIS-1725: added initial sleep for polling virus scan result (since it takes time for external virus scanner to give the result when file has been uploaded)

TEIS-1584: replaced WebClient library with RestTemplate when querying for virus scan result from third party service

TEIS-1584: removed FAILED scan status type and it's corresponding business logic, replaced files-virus-scan-service result message request types from DomainAsyncRequestDTO -> DomainEventDTO