MODE-1812 DDL Parser and Sequencer for Teiid's dialect
Saving off initial code. Most of parser is done. Some work in the create trigger needs to be done. And work on sequencer is left to do.

MODE-1812 DDL Parser and Sequencer for Teiid's dialect
Work on getting table, view, procedure, and column references working in various statements.

MODE-1812 Changed CND node types to be mixins. Added sequencer tests.
Changed parser scoring to now include both statements and keywords.
MODE-1812 MODE-1812 DDL Parser and Sequencer for Teiid's dialect
Add more sequencer tests. Changed the way some nodes are named. Removed all TeiidDdlParser methods that were not being called.
Added mix:referenceable to the node types that are being referenced. Removed the "canBeNull" property from the CND and replaced
it with the standard DDL property of "nullable." No longer throw exception if a referenced element is not found; now just logging
a debug method.
MODE-1812 DDL Parser and Sequencer for Teiid's dialect
Removing MySqlDdlParser from the pool of available parsers. This should not have been added in.
MODE-1873 Corrected how subquery results are converted to criteria

When a subquery selected a pseudo-column (like 'jcr:path'), the query
result contained Path instances. These values could not be successfully
used in criteria, since they were not converted to the correct value type
expected in the dependent query. Since only pseudo-columns were a problem
(and really only the 'jcr:path' and 'jcr:name' pseud-columns since they
return Path and Name values, respectively), the code that grabs the
subquery results was modified to convert these non-standard types
to strings.

A test case was added to the text sequencer test case, since that was
the best place for replicating the problem query (which used the
'mode:derivedFrom' property created during the sequencing operation).
However, once the problem was identified, I created a simple test
case within the JcrQueryManagerTests.
Corrected compiler warning
MODE-1851 Added test case to show 3-way joins do work

Added a test case that uses the S-RAMP node type design and checks
that 3-way joins can be used to 'resolve' S-RAMP relationships.
MODE-1888 Added warnings to queries

The ModeShape-specific query API not includes warnings on QueryResult objects. ModeShape will include warnings in a number of cases, including when column names are misspelled (via common patterns), or when columns is a better match with a different selector.

Several new test cases were added to verify the behavior.
Moved the AS7 subsystem and distributions modules back in the main build list, so that a simple `mvn clean install` will build the AS7/EAP dist by default. For the rest of the profiles (assembly, integration etc) Maven will resolve the correct order (based on dependencies) when they are activated.
MODE-1872 - Changed the default configuration so that re-indexing is done asynchronously. This exposed the need to be able to shut down the re-indexing process when a repository is shutdown.
MODE-1872 - Fixed lazy workspace creation, so that it's atomic.