Fixed issue #1591
Merge branch 'issue1591' into hotfix-1.5.1
Merge branch 'hotfix-1.5.1' of https://github.com/orientechnologies/orientdb into hotfix-1.5.1
Fixed issue on serialization on embedded maps
FIxed issue on condition in dot notation: types were not converted
Improved distributed conflict management for issue #1598
Fixed issue on DOS server attack
network connections now check and in case wait is the node is online before to execute any command
First level cache replaced by unbounded weak implementation
memory.useUnsafe flag was added to prevent Unsafe usage if it cause problems.
Extract OFreezableStorage interface
(cherry picked from commit ad79b53)
Added support of freeze operation to distributed storage
(cherry picked from commit 75cefad)
Added support of freeze operation to distributed storage
(cherry picked from commit bfba716)
Fix in ObjectDatabase Map type casting on loading
Added test for ObjectDatabase embedded Map<String,Object> save & load
Fixed issue #1643
Merge branch 'hotfix-1.5.1' of https://github.com/orientechnologies/orientdb into hotfix-1.5.1
Merged 1e2412bdbeefe8b916a58c46e8e5c3be3e5c422f
Merge branch 'hotfix-1.5.1' of github.com:/orientechnologies/orientdb into hotfix-1.5.1
Fixed bug on MVRB-Tree-RID-Set built with default 8 items as threshold instead of reading the configuration