SSP-875 external tables modified for 1.2

Added script to update first,middle,last names
in external student transcript course.

Conflicts:
	src/main/resources/org/jasig/ssp/database/masterChangeLog.xml
NOJIRA Add license headers
SSP-875 Fix compiler error on missing import
SSP-875 Fix Liquibase constraint changes for SqlServer
SSP-875 Remove ExternalStudentsByCourse Java model and dependencies
SSP-875 Fixes External Tables issues

PLEASE NOTE checksum for i000009.xml has changed
Conflicts:
	src/test/resources/org/jasig/ssp/database/masterChangeLog-test.xml
SSP-882 Removed Table and view and java code
SSP-882 Java code removed External Course Section
SSP-875 Fixed dropNotNullConstraints
SSP-882 external_course_section
Required liquibase script added.