RDC python binding

A new folder python_binding is created for RDC python binding:
* The rdc_bootstrap.py is a python ctypes wrapper for the librdc_boostrap.so
* The RdcUtil.py defines common utilities for RDC to manage group/fieldgroup
* The RdcReader.py is a class to simplify the usage of the RDC:
  - The user only needs to specify which fields he wants to monitoring.
     RdcReader will create groups and fieldgroups, watch the fields, and fetch the fields.
  - The RdcReader can support embedded and standalone mode.
  - The standalone can be with authentication and without authentication.
  - In standalone mode, the RdcReader can automatically reconnect to the rdcd when the connection is lost.
  - When rdcd is restarted, the previously created group and fieldgroup may lose.
    The RdcReader can re-create them and watch the fields after reconnect.
  - If the client is restarted, RdcReader can detect the groups and fieldgroups
    created before and avoid re-create them.
  - The user can pass the unit converter if he does not want to use RDC default unit.

Change-Id: I109ec86012f37162eb13f7d3e921115b7dd82369


[ROCm/rdc commit: 9209c6c516]

projects/rdc/rdc_libs/bootstrap/src/RdcBootStrap.cc

@@ -357,6 +357,14 @@ const char* field_id_string(rdc_field_t field_id) {
   return field_id_to_descript.find(field_id)->second.label.c_str();
 }
 
+rdc_field_t get_field_id_from_name(const char* name) {
+        rdc_field_t value;
+        if (amd::rdc::get_field_id_from_name(name, &value)) {
+                return value;
+        }
+        return RDC_FI_INVALID;
+}
+
 char *strncpy_with_null(char *dest, const char *src, size_t n) {
      if (n == 0) {
         return dest;