Fix warnings in sol003 tests related to RequestsLibrary

Instead of the deprecated methods Post Request and Get Request, the
new methods Post On Session and Get On Session are used.

Change-Id: I64f0f575c752743b0125385f08c1fc5731457881
Signed-off-by: dhanasekaran <ragavi.d@tataelxsi.co.in>
diff --git a/robot-systest/lib/sol003_common_lib.robot b/robot-systest/lib/sol003_common_lib.robot
index 795a1a3..c0e7323 100644
--- a/robot-systest/lib/sol003_common_lib.robot
+++ b/robot-systest/lib/sol003_common_lib.robot
@@ -22,8 +22,6 @@
 Resource          %{ROBOT_DEVOPS_FOLDER}/lib/vim_lib.robot
 
 *** Variables ***
-&{HEADERS}        Content-Type=application/json    Accept=application/json
-&{data}           username=admin    password=admin    project-id=admin
 @{success_status_code_list}    200    201    202    204
 ${descriptor_content_type_gzip}    application/gzip
 ${auth_token_uri}    /osm/admin/v1/tokens
@@ -37,8 +35,9 @@
     [Tags]    auth_token
     Get Hostname
     Create Session    osmhit    ${HOST}
-    Log Many    ${auth_token_uri}    @{data}    ${data}
-    ${resp}=    Post Request    osmhit    ${auth_token_uri}    data=${data}    headers=${HEADERS}
+    &{headers}   Create Dictionary   Content-Type=application/json   Accept=application/json
+    &{data}   Create Dictionary   username=admin   password=admin    project-id=admin
+    ${resp}=    Post On Session    osmhit    ${auth_token_uri}    json=${data}    headers=${headers}
     log    ${resp}
     Pass Execution If    ${resp.status_code} in ${success_status_code_list}    Get Auth Token completed
     Set Suite Variable    ${token_status_code}    ${resp.status_code}
@@ -66,7 +65,7 @@
     [Documentation]    Keword to Post API Request
     Create Session    APISession    ${HOST}
     &{headers}    Create Dictionary    Content-Type=application/json    Accept=application/json    Authorization=Bearer ${access_token}
-    ${request_response}=    Post Request    APISession    ${PostApi}    data=${updated_json_obj}    headers=${headers}
+    ${request_response}=    Post On Session    APISession    ${PostApi}    json=${updated_json_obj}    headers=${headers}
     Set Suite Variable    ${request_response}
     ${response_statuscode}    Convert To String    ${request_response.status_code}
     Set Suite Variable    ${response_statuscode}
@@ -97,7 +96,7 @@
     [Documentation]    Keyword to Get API Request
     Create Session    Session    ${HOST}
     &{headers}    Create Dictionary    Content-Type=application/json    Accept=application/json    Authorization=Bearer ${access_token}
-    ${request_response}=    Get Request    Session    ${uri}    headers=${Headers}
+    ${request_response}=    Get On Session    Session    ${uri}    headers=${Headers}
     Set Suite Variable    ${request_response}
     ${response_statuscode}    Convert To String    ${request_response.status_code}
     Set Suite Variable    ${response_statuscode}