avoid (deprecated) Java.java_to_ruby use JavaUtil.convertJavaToRuby
when wrapping java.sql.Connection object into a Ruby object ...
re-arranged code to have code that sets connection on one place
add some (probably redundant) synchronization + arjdbc.disconnect.debug
for attempting to detect when connection is (closed and) set to null - this should be removed once #197 #198 are closed
backport History.txt for 1.2.7
sqlserver adapter code cleanup + refactored (ArJdbc::) MsSQL -> MSSQL
[mssql] run more tests, change default constrain sql on 2005+ (closes #320)
remove a few quoting methods (implemented in Java) + some more cleanup
adding a :connection_alive_sql test
Correct typo on documentation

The constant was written JDTS instead of JTDS.
Since people copy and paste, it can be a tricky one...
Fixing substring issue that prevents detecting a query that contains *
[mssql] add a has_many :though tests + re-arrange tests a bit (closes #171)

NOTE: a failure commit fd27edfe08867235 fixes was only reproducable with 3.0 and 3.1 while running in JRuby --1.8 mode
a 'valid' connection alive SQL for HSQLDB
more ms-sql adapter rerfactoring (table_name / quoting related) :
- make sure it's clear when table_name need to get un-quoted/qualified
- introduce Utils (with not-just a bunch of unquoting helper methods)
- explicit table_exists? since super might change
[MSSQL] fix table/column name quoting - do not quote if quoted already
do not call_discovered_column_callbacks for extending column impls
re-invent some OOP for caseConvertIdentifierForJdbc
need test-unit-context gem for some new (shoulda copied) ms-sql tests
[mssql] get_primary_key hack only needed for 2000 - thus move from utils
+ support Model.table_name to be set quoted as well as unquoted
[DB2] seems like DB2 on ZOS used a non-existing get_primary_key method
[mssql] more quoting tests + table_exists? shall return a true/false
[mssql] multiple (db) connections test (to guard against regressions #329)
erge remote-tracking branch 'upstream/master'

Conflicts:
	lib/arjdbc/mssql/limit_helpers.rb