RFR: JDK-8074395: Random build failures in javadoc on Solaris

[Erik Joelsson]

Hello,

JPRT builds on Solaris randomly fails. The failures look like the 
typical problem of over allocating resources on Solaris. This time it 
seems like it's too many instances of javadoc that overloads the machine.

My suggested fix is to use the JAVA_SMALL flags for all javadoc 
invocations except the main one for the core apis. The main invocation 
is big and needs a big jvm configuration. All the rest are comparably 
very small and should be fine with a small configuration. Preliminary 
testing on my local linux machine shows no performance regression from 
this change.

Bug: https://bugs.openjdk.java.net/browse/JDK-8074395
Webrev: http://cr.openjdk.java.net/~erikj/8074395/webrev.root.01/

/Erik