Merge pull request #2481 from suryanarayanakb/release-6.6.3.a1

Save function done
Changes for file download
Merge pull request #2482 from ssushma/release-6.6.3.a1

Changes for file download
Merge remote-tracking branch 'upstream/release-6.6.3.a1' into release-6.6.3.a1

Conflicts:
	src/main/java/org/ednovo/gooru/client/mvp/analytics/collectionSummaryTeacher/CollectionSummaryTeacherView.ui.xml
	src/main/java/org/ednovo/gooru/server/service/AnalyticsServiceImpl.java