MULE-7433: Add DB connector to mule code base

    _ Removing DbConnection#getDelegate
    _ Improving logging in StatementResultIterator
    _ Renaming parameter in UnresolvableDbConfigException constructor
    _ Adding logging to TransactionDbConnectionFactory
    _ Adding logging to TransactionDbConnectionFactory
MULE-7433: Add DB connector to mule code base

 _ Reverting some added logging from TransactionDbConnectionFactory
MULE-7433: Add DB connector to mule code base

 _ Cleaning TODOs
 _ Created jiras: MULE-7451, MULE-7452, MULE-7453, MULE-7454
MULE-7236: Add support for attachments in web service consumer
MULE-7440: New database: query template's parameter types are not resolved

_ Adding small tests
Merge pull request #508 from hazendaz/mule-3.x

Updated Relocated Dependency jgrapht
Merge pull request #501 from mulesoft/MULE-7433

MULE-7433: Add DB connector to mule code base
Merge pull request #509 from mulesoft/MULE-7440

MULE-7440: New database: query template's parameter types are not resolv...
MULE-7459: Modified the Mule configuration file under the dist folder to match the source one.
Merge pull request #511 from mulesoft/MULE-7459

MULE-7459: Modified the Mule configuration file under the dist folder to...
MULE-7366: Allow local resource loading for artifact class loaders. Now a class loader can locate certain resources looking in application folders first and then, if not found look for it at domain or container levels.
MULE-7366: Removed empty javadoc.
Merge pull request #513 from mulesoft/MULE-7366

MULE-7366: Allow local resource loading for artifact class loaders. Now ...
MULE-7366: The new way to obtain local resources needs a directory structure that this test has not, then log4j.properties resource is loaded from the classpath.
Merge pull request #515 from mulesoft/MULE-7366

MULE-7366: The new way to obtain local resources needs a directory struc...
MULE-7236: Add support for attachments in web service consumer

Create the CXF attachments set with the expected initial capacity
Merge pull request #510 from mulesoft/MULE-7236

MULE-7236: Add support for attachments in web service consumer
MULE-7465: XPATH Expression Language - Dom4J creates separate text-nodes
Merge pull request #518 from mulesoft/MULE-7465

MULE-7465: XPATH Expression Language - Dom4J creates separate text-nodes
MULE-7478: All test log4j.properties should have the rootLogger at WARN level