Refactored the BlogService so that templates are no longer used. Introduced serializers instead
Use BaseService.getAtomHeaders
Merge pull request #1468 from markewallace/GetAtomHeaders

Get atom headers
Tidied line spacings, removed unecessary 'super' and 'this', refactored atom header creation and removed old print statements
Merge pull request #1467 from benjamij/blog-serializer

Blog serializer
Added constants
Removed constants
Introduced BlogConstants
Introduced BlogConstants
Fixed BlogConstants
Removed constants
Merge pull request #1471 from benjamij/constants

Constants
Merge remote-tracking branch 'origin/2.0.0-alpha' into
java-refactor-common-entities

Conflicts:
	sdk/com.ibm.sbt.core/src/main/java/com/ibm/sbt/services/client/connections/blogs/BlogService.java