title: convert an rdd of dictionary to df
body: <p>How can i make an pipelined rdd of dict into a dataframe in pyspark</p>
  
  <pre><code>[{'ACARS 20170507/20170506085012209001.rcv': 'QU SOUTA8X\r\n.BJSXCXA 060849\r\nM12\r\nFI CX731/AN B-LAN\r\nDT BJS HKG 060849 M63A\r\n-  OFF,V01,CX 731 20170506 1,VHHH,OMDB,0833,0849,----,  600', 'ACARS 20170507/20170502020906017001.rcv': 'QU SOUTA8X\r\n.BJSXCXA 020209\r\nM12\r\nFI KA876/AN B-LAB\r\nDT BJS HKG 020209 M11A\r\n-  OFF,V01,KA 876 20170502 1,VHHH,ZSPD,0149,0208,----,  294', 'ACARS 20170507/20170505050124358002.rcv': 'QU SOUTA8X\r\n.BKKXCXA 050501\r\nCFD\r\nFI CX690/AN B-LAJ\r\nDT BKK XSP 050501 C10A\r\n-  .1/WRN/DBN17D/WN1705050500  261707002SMOKE LAVATORY DET FAULT'}]
  </code></pre>