RFR(S): 8209598: Use log_error for error message in CDS code

[Calvin Cheung]

bug: https://bugs.openjdk.java.net/browse/JDK-8209598

webrev: http://cr.openjdk.java.net/~ccheung/8209598/webrev.00/

Use log_error(cds) instead of tty->print_cr for CDS error messages. Also 
converted 2 CDS info messages to log_info(cds).

Testing: mach5 hs-tier{1,2,3}

thanks,
Calvin