killbill-memoizeit

Merge remote-tracking branch 'origin/invoice2' into new-amount-decimals-handling-rfc Signed-off-by: …

Pierre-Alexandre Meyer <pierre@mouraf.org>

Conflicts:
	beatrix/src/test/java/com/ning/billing/beatrix/integration/TestSubscription.java
	invoice/src/test/java/com/ning/billing/invoice/TestInvoiceHelper.java
	invoice/src/test/java/com/ning/billing/invoice/tests/inAdvance/annual/TestProRation.java
	invoice/src/test/java/com/ning/billing/invoice/tests/inAdvance/quarterly/TestProRation.java

Fix a bug in calculation of firstBillingCycleDay. Add unit …

tests of that method to verify through various case scenarios that it computes the right date.

Invoice fix to address issues related with leading pro-rations. In …

the case of billingPeriod different than MONTHLy the current code would do an initial leading pro-ration to the billCycleDate within
the current or next months. Those would cause different issues as documented in #57, #146 and #160.

The new logic will compute the longest leading pro-ration and as a side effect will address those issues.

Fixes #57, Fixes #146, Fixes #160

Minor edit for code review integration of invoice tree code

NodeInterval and other invoice tree related classes rework; …

in particular:
- Fix search apis and add unit tests
- Add method to walk the tree and build json serialization on top of it.
- Other renaming

Add unit tests for NodeInterval

Rework the NodeInterval class to abstract the custom logic …

and leave that class very generic.

Revert walkChildren method introduced in NodeInterval

Code review integration - Introduce tree walker - Fix item …

adjustement ordering problem
- Rework ItemsInterval

Fix parent pointer in invoice tree node Fix issue in rebalance Initial …

unit tests for NodeInterval class