Spelling fixes

Spelling errors found using github.com/lucasdemarchi/codespell
A tool to fix common misspellings.
This tool is licensed under GNU General Public License, version 2.

Change-Id: I99ddfba10e88b764554107ac6859502ef09c6234
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/extended/test_error_log.robot b/extended/test_error_log.robot
index 6b8d37d..1ae7808 100644
--- a/extended/test_error_log.robot
+++ b/extended/test_error_log.robot
@@ -25,7 +25,7 @@
     # 1. Power off.
     # 2. Delete error logs.
     # 3. Reboot BMC.
-    # 4. Check if eror log exists.
+    # 4. Check if error log exists.
 
     Smart Power Off
     Delete Error Logs And Verify
@@ -38,7 +38,7 @@
     [Tags]  Error_Log_Check_At_Host_Booted
     # 1. Delete error logs
     # 1. Power on.
-    # 3. Check if eror log exists.
+    # 3. Check if error log exists.
 
     Delete Error Logs And Verify
     REST Power On
diff --git a/extended/test_network.robot b/extended/test_network.robot
index cfa25ef..8f672a6 100644
--- a/extended/test_network.robot
+++ b/extended/test_network.robot
@@ -162,7 +162,7 @@
     # IP Address     Prefix_length         Gateway_IP        Expected_Result
     @@@.%%.44.11     ${valid_prefix_len}   ${valid_gateway}  error
 
-    [Documentation]  Configure invalid IP address contaning special chars.
+    [Documentation]  Configure invalid IP address containing special chars.
     [Tags]  Configure_Special_Char_IP
 
     [Template]  Configure Network Settings
@@ -171,7 +171,7 @@
     # IP Address  Prefix_length        Gateway_IP        Expected_Result
     ${hex_ip}     ${valid_prefix_len}  ${valid_gateway}  error
 
-    [Documentation]  Configure invalid IP address contaning hex value.
+    [Documentation]  Configure invalid IP address containing hex value.
     [Tags]  Configure_Hexadecimal_IP
 
     [Template]  Configure Network Settings
diff --git a/extended/test_network_nping.robot b/extended/test_network_nping.robot
index de0a92e..9e067ac 100644
--- a/extended/test_network_nping.robot
+++ b/extended/test_network_nping.robot
@@ -47,7 +47,7 @@
     # ${port}- Network port.
 
     # This program expects host, port, type and number of packets to be sent
-    # and rate at which packets to be sent, should be given in commad line
+    # and rate at which packets to be sent, should be given in command line
     # by default it sends 100 TCP packets at 5 packets/second.
 
     ${cmd_buff}=  Run Keyword If  '${packet_type}' == 'icmp'