LastStepMappings in case of duplicate code

[tsantalis]

Related to #89

thunderbird/thunderbird-android@9d44f0e

In L3480, the should be multi-mappings for
localFolder.getName() and getRootCauseMessage(e)
These are duplicate codes extracted in a common method notifySynchronizeMailboxFailed()
On top of the extracted statements, there are two Extract Variable refactorings applied, which introduce sub-expression mappings.

Activiti/Activiti@a70ca1d
A similar scenario takes place of the sub-expression
persistentObjectsToInsert.size() == 1
One of the duplicated code fragments has an overlapping Split Conditional refactorings, while the other duplicated code fragment in an exact match if (persistentObjectsToInsert.size() == 1).

[tsantalis]

@pouryafard75
I fixed the first problem. The equals and hashCode of ExtractVariableRefactoring should include the references too.

[tsantalis]

List<PersistentObject> persistentObjectsToInsert
Variable declaration in L788 &
Variable declaration in L802
should have been a multi-mapping with the parameter in R803

R789 is basically an Inline Variable that comes ONLY from L788
R796 is also an Inline Variable that comes from L802, but in this case there is a Rename Variable on top
clazz -> persistentObjectClass