JDK 9 RFR(m): 8177788 migrate collections docs into jdk doc-files

[Stuart Marks]

Hi all,

Here's another step in the docs cleanup: migration of the collections 
technotes/guides into the JDK's javadoc doc-files. This is a webrev containing 
two changesets:

JDK-8177787 copy collections technotes/guides html files into jdk doc-files
JDK-8177788 fix links, minor editing, add Java SE 9 changes to collections docs

The main way to reach these pages will now be a link from the java.util package 
documentation.

There are a bunch of places around the javadoc that point to the obsolete 
location of the collections docs. These are typically within sentences of the 
form "This class is a member of the Java Collections Framework." The next step 
will be to change all those links to point to the docs in their new location.

Here's the webrev:

http://cr.openjdk.java.net/~smarks/reviews/8177788/webrev.0/

Thanks,

s'marks