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In a recent management server crash, it was found that the largest contributor to memory leak was in VmwareContextPool where a registry is held (arraylist) that grows indefinitely. The list itself is not used anywhere or consumed. There exists a hashmap (pool) that returns a list of contexts for existing poolkey (address/username) that is used instead. This fixes the issue by removing the arraylist registry, and limiting the length of the context list for a given poolkey. Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>