Don't calculate serialized size in ParameterSet.readExternal().
Don't calculate serialized size in ParameterSet.readExternal().

Ariel pointed out that if a parameter set is created using readExternal(), it
shouldn't be serialized by calling flattenToBuffer(), which needs the encoded
strings and memoized serialized size. So if a parameter set is used by calling
readExternal()/writeExternal(), it doesn't have to call
calculateSerializedSize().

flybird119/voltdb,zuowang/voltdb,kumarrus/voltdb,deerwalk/voltdb,ingted/voltdb,kobronson/cs-voltdb,ingted/voltdb,creative-quant/voltdb,flybird119/voltdb,migue/voltdb,zuowang/voltdb,wolffcm/voltdb,simonzhangsm/voltdb,creative-quant/voltdb,ingted/voltdb,paulmartel/voltdb,paulmartel/voltdb,ingted/voltdb,migue/voltdb,kumarrus/voltdb,VoltDB/voltdb,flybird119/voltdb,simonzhangsm/voltdb,paulmartel/voltdb,migue/voltdb,kumarrus/voltdb,deerwalk/voltdb,kobronson/cs-voltdb,creative-quant/voltdb,migue/voltdb,creative-quant/voltdb,simonzhangsm/voltdb,zuowang/voltdb,wolffcm/voltdb,ingted/voltdb,paulmartel/voltdb,wolffcm/voltdb,VoltDB/voltdb,creative-quant/voltdb,zuowang/voltdb,deerwalk/voltdb,creative-quant/voltdb,zuowang/voltdb,deerwalk/voltdb,kumarrus/voltdb,simonzhangsm/voltdb,kumarrus/voltdb,kobronson/cs-voltdb,VoltDB/voltdb,kumarrus/voltdb,deerwalk/voltdb,VoltDB/voltdb,flybird119/voltdb,kobronson/cs-voltdb,VoltDB/voltdb,paulmartel/voltdb,simonzhangsm/voltdb,wolffcm/voltdb,kumarrus/voltdb,wolffcm/voltdb,flybird119/voltdb,ingted/voltdb,VoltDB/voltdb,migue/voltdb,migue/voltdb,zuowang/voltdb,kobronson/cs-voltdb,creative-quant/voltdb,migue/voltdb,ingted/voltdb,zuowang/voltdb,migue/voltdb,wolffcm/voltdb,paulmartel/voltdb,flybird119/voltdb,creative-quant/voltdb,kobronson/cs-voltdb,ingted/voltdb,kobronson/cs-voltdb,deerwalk/voltdb,kumarrus/voltdb,flybird119/voltdb,kobronson/cs-voltdb,wolffcm/voltdb,deerwalk/voltdb,deerwalk/voltdb,wolffcm/voltdb,VoltDB/voltdb,zuowang/voltdb,simonzhangsm/voltdb,simonzhangsm/voltdb,paulmartel/voltdb,paulmartel/voltdb,simonzhangsm/voltdb,flybird119/voltdb