AC-1754 ERXExistsQualifier was doing a global replace of the key in the select statement but should have only replaced once. Without this fix, we cannot reliably chain ExistsQualifiers.

Signed-off-by: Aaron Rosenzweig <aaron@chatnbike.com>

Conflicts:
	Frameworks/Core/ERExtensions/Sources/er/extensions/eof/qualifiers/ERXExistsQualifier.java
Modified table alias matching code to avoid incorrect matches when Postgressql. When trying able alias declarations for t4 and t8, it would also match variable bindings for that had a datatype of int4 and int8 e.g., “?::int8” and “?::int4”
Revert unintended change to ERXMappingObjectStream.
Merge branch 'ERProperties_ClassNameUpdate' of https://github.com/amagavi/wonder
Merge branch 'ERXExistsQualifier_ReplaceOnce' of https://github.com/amagavi/wonder

Conflicts:
	Frameworks/Core/ERExtensions/Sources/er/extensions/eof/qualifiers/ERXExistsQualifier.java