feat(API)：增加TsgAPI接口测试用例

Keyring策略文件、
可信证书颁发机构策略文件、
内容劫持策略文件、
访问阻断页面策略文件、
注入脚本策略文件、
流量转发目的地址配置和中间证书

01-TestCase/tsg_bfapi/policy_file_interface/ClearAllPolicy.robot

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+*** Settings ***
+Force Tags    tsg_bf_api    Clear_All_Policys
+Library    String
+Library    OperatingSystem
+Library    Selenium2Library
+Library    Collections
+Resource    ../../../02-Keyword/tsg_bfapi/common.robot
+Resource    ../../../02-Keyword/tsg_bfapi/policy_file_interface/functionalKeywords.robot
+Resource    ../../../03-Variable/bifangapivariable.txt
+
+*** Variables ***
+${url1}    /policy/profile/keyringobj 
+${url2}    /policy/profile/trustedcacertobj  
+${url3}    /policy/profile/responsepages  
+${url4}    /policy/profile/hijackfiles
+${url5}    /policy/profile/insertscripts
+${url6}    /policy/profile/trafficmirror
+
+*** Test Cases ***
+Keyring Policy delete all case
+    # 清空所有策略!!!
+    ${reqData}    Create Dictionary    isClear=true
+    DeletePolicyFile    ${url1}    ${reqData}    
+
+Trusted Cert Policy delete all case
+    # 清空所有策略!!!
+    ${reqData}    Create Dictionary    isClear=true
+    DeletePolicyFile    ${url2}    ${reqData}
+    
+Response Pages Policy delete all case
+    # 清空所有策略!!!
+    ${reqData}    Create Dictionary    isClear=true
+    DeletePolicyFile    ${url3}    ${reqData}
+    
+Hijack Files Policy delete all case
+    # 清空所有策略!!!
+    ${reqData}    Create Dictionary    isClear=true
+    DeletePolicyFile    ${url4}    ${reqData}
+
+Insert Scripts Policy delete all case
+    # 清空所有策略!!!
+    ${reqData}    Create Dictionary    isClear=true
+    DeletePolicyFile    ${url5}    ${reqData}
+    
+Traffic Mirror Policy delete all case
+    # 清空所有策略!!!
+    ${reqData}    Create Dictionary    isClear=true
+    DeletePolicyFile    ${url6}    ${reqData}
+    
+