added test case of multiple record operation
added test case of multiple record operation

bhaskarmelkani/jsforce,lkatney/jsforce,parthiban019/jsforce,polidog/jsforce,parthiban019/jsforce,lkatney/jsforce,nutthawan/jsforce,jesperkristensen/jsforce,joeferraro/jsforce,bhaskarmelkani/jsforce,saleswise/jsforce,jsforce/jsforce,jdcrensh/jsforce,jdcrensh/jsforce,saleswise/jsforce,pcon/jsforce,pcon/jsforce,rdietrick/jsforce,joeferraro/jsforce,jsforce/jsforce,saleswise/jsforce,stomita/node-salesforce,jsforce/jsforce,nutthawan/jsforce,kimchouard/jsforce,pcon/jsforce,jesperkristensen/jsforce