1.Fixed displaying class info bug.
2.changed data logs events parent id from classpage id
to unit id.
Merge branch 'dev-branch' of https://github.com/Gooru/Gooru-Web into dev-branch

Conflicts:
	src/main/java/org/ednovo/gooru/server/request/UrlToken.java
Merge pull request #1813 from shivalinga/dev-branch

Fixed displaying class info issue,changed data logs events  parent id value