RFR: JDK-8213263: fix legal headers in test/langtools

[Jonathan Gibbons]

Please review a tedious but conceptually simple update to fix the legal 
headers in a lot of test/langtools files.

The change is to remove the '"Classpath" exception' from the header, 
which should not be used in test files.

The change was made by executing the following script:

grep -rl '"Classpath" exception' test/langtools | xargs sed --in-place \
     -e 's/  Oracle designates this//' \
     -e '/particular file as subject to the "Classpath" exception as 
provided/d' \
     -e '/by Oracle in the LICENSE file that accompanied this code./d'

After applying the script and running the tests, two tests failed. These 
two tests were golden-file tests and were internally inconsistent: they 
had a full legal header, in addition to the special token 
"/nodynamiccopyright/" to justify that they should not have a full legal 
header.  These tests, and their golden files, were manually updated.  
The affected files were:

test/langtools/tools/javac/lvti/T8200199.java
test/langtools/tools/javac/lvti/T8200199.out
test/langtools/tools/javac/lvti/badTypeReference/BadTypeReference.java
test/langtools/tools/javac/lvti/badTypeReference/BadTypeReference.out

JBS: https://bugs.openjdk.java.net/browse/JDK-8213263
Webrev: http://cr.openjdk.java.net/~jjg/8213263/webrev.00/

With the exception of the 4 files listed above, it may be easiest to 
scan through the patch file directly.

-- Jon