add comma to separate payload
fixing NPE in debug logs
adding eventing support for monitors
initial changes for hierarchical topology locking
hierarchical locking contd.
adding comments for lock methods and handling a possible BPE
startupOrder format change I
add Http connection manager
Merge branch '4.0.0-grouping' of https://git-wip-us.apache.org/repos/asf/stratos into 4.0.0-grouping
Fixing sonar finding storing arrays directly
refactoring Group and Application to a common super type 'ParentComponent'
running messaging threads concurrently
setting timeout of test methods to 10 seconds
Adding Sonar Quality Profile
Added license header for sonar quality profile
startupOrder format change II
removing synchronization in releaseWriteLockForApplication and acquireWriteLockForApplication
adding exception and fixing monitor startup issues
putting API method details in the TopologyManager class
fixing the merging issue