Ensure CLI exit 1 with negative result

When the deploy precheck condition is not met, ensure CLI exit code 1.

Closes-bug: 2065193

TCs:
    Passed: verify CLI exit code 1 when precheck condition not met for
            both software deploy precheck and software deploy start.
    Passed: verify CLI exit code 0 when deploy precheck pass
    Passed: verify CLI exit code 0 when deploy start pass

Change-Id: I0f73497140fcc82e3c8f583e9b421d2ff3e4db30
Signed-off-by: Bin Qian <bin.qian@windriver.com>

software-client/software_client/common/http.py

@@ -149,6 +149,7 @@ def _extract_error_json(body, resp):
         except ValueError:
             return {}
 
+
 class Response(object):
     """SessionClient and HttpClient do not return the same
     response object. This calss is to create a common response

software-client/software_client/v1/deploy_shell.py

@@ -40,6 +40,7 @@ def do_show(cc, args):
 
     return rc
 
+
 def do_host_list(cc, args):
     """List of hosts for software deployment """
     resp, data = cc.deploy.host_list()
@@ -78,9 +79,14 @@ def do_precheck(cc, args):
     if args.debug:
         utils.print_result_debug(resp, data)
 
-    utils.display_info(resp)
+    rc = utils.check_rc(resp, data)
+    if rc == 0:
+        if data["system_healthy"] is False:
+            print("System is unhealthy for deploy")
+            rc = 1
 
-    return utils.check_rc(resp, data)
+    utils.display_info(resp)
+    return rc
 
 
 @utils.arg('deployment',
@@ -96,9 +102,14 @@ def do_start(cc, args):
     if args.debug:
         utils.print_result_debug(resp, data)
 
-    utils.display_info(resp)
+    rc = utils.check_rc(resp, data)
+    if rc == 0:
+        if "system_healthy" in data and data["system_healthy"] is False:
+            print("System is unhealthy for deploy")
+            rc = 1
 
-    return utils.check_rc(resp, data)
+    utils.display_info(resp)
+    return rc
 
 
 @utils.arg('host',