pldm: Optimized parsing of PDR JSON files

Move the generateStateEffecterRepo method of parse JSON to
pdr_state_effecter.hpp.

Tested with JSON files:
 https://gist.github.com/lxwinspur/2c3fd68cdb35e06480c4a5f7890e3a06#file-effecter_pdr-json.

 pldmtool platform GetPDR -d 1
 Encode request successfully
 Request Message:
 08 01 80 02 51 01 00 00 00 00 00 00 00 01 80 00 00 00
 Success in creating the socket : RC = 3
 Success in connecting to socket : RC = 0
 Success in sending message type as pldm to mctp : RC = 0
 Write to socket successful : RC = 18
 Total length:18
 Loopback response message:
 08 01 80 02 51 01 00 00 00 00 00 00 00 01 80 00 00 00
 On first recv(),response == request : RC = 0
 Total length: 46
 Shutdown Socket successful :  RC = 0
 Response Message:
 08 01 00 02 51 00 02 00 00 00 00 00 00 00 01 1d 00 01 00 00 00 01 0b 00 00 13 00 00 00 01 00 21 00 00 00 00 00 00 00 00 00 01 c4 00 01 06
 Parsed Response Msg:
 nextRecordHandle: 2
 responseCount: 29
 recordHandle: 1
 PDRHeaderVersion: 1
 PDRType: 11
 recordChangeNumber: 0
 dataLength: 19
 PLDMTerminusHandle: 0
 effecterID: 1
 entityType: 33
 entityInstanceNumber: 0
 containerID: 0
 effecterSemanticID: 0
 effecterInit: 0
 effecterDescriptionPDR: false
 compositeEffecterCount: 1
 stateSetID: 196
 possibleStatesSize: 1
 possibleStates: 6

Signed-off-by: George Liu <liuxiwei@inspur.com>
Change-Id: I8428ed042fb0a90ecc448073f059f66360066306
diff --git a/libpldmresponder/pdr_utils.hpp b/libpldmresponder/pdr_utils.hpp
index 1f03863..6df5d94 100644
--- a/libpldmresponder/pdr_utils.hpp
+++ b/libpldmresponder/pdr_utils.hpp
@@ -51,6 +51,8 @@
 /** @brief Map of DBus property State to attribute value
  */
 using StatestoDbusVal = std::map<State, pldm::utils::PropertyValue>;
+using DbusMappings = std::vector<pldm::utils::DBusMapping>;
+using DbusValMaps = std::vector<StatestoDbusVal>;
 
 /** @brief Parse PDR JSON file and output Json object
  *