Java Rop null-byte free

Our new heap spray routine does not like double nulls, so we need
to adjust our ROP.
New pt for virtualprotect, and readjust size to 0x401
Merge branch 'java_rop_update' of https://github.com/wchen-r7/metasploit-framework into wchen-r7-java_rop_update
fix comma typo