JBIDE-14917 - fixes as per fred's suggestions
TEIIDDES-1857: Creates a cross-platform file name validator

* FileNameValidator
 * Provides a single class that validates a file name against the underlying
   filesystem.
 * Single, centralised point for determining validity of file names.
 * Avoids trying to provide too many rules concerning known filesystems
   and OSs by using the file name to create a temporary file.
 * Provides set of options to enhance the validator such as ability to add
   other reserved characters, add reserved words and modify the directory
   where the temporary file test is conducted.

* Includes unit tests for validator
Revert "TEIIDDES-1857: Creates a cross-platform file name validator"

This reverts commit 1cd8d0349e2d0aa5ba909adef4723477b0667fcf.
JBIDE-15386 Resolve values in annotations given by expressions

Implemented resolution of Java expressions for values in annotations and in constants.
Test is added.
JBIDE-15478 - initial implementation

JBIDE-15478 - further cleanup

JBIDE-15478 expanded javadoc

JBIDE-15478 correcting indentation for new class

JBIDE-15478 updates as per requests on PR

JBIDE-15478 changing license on expression resolver to EPL as per dmlloyd's approval (original author)