FS-7648 adding leave/check videomail test cases

conf/testing/dialplan/default/0001_vmain.xml

 <extension name="vmain">
-  <condition field="destination_number" expression="^vmain$|^4000$|^\*98$">
+  <condition field="destination_number" expression="^vmain$|^\*98$">
     <action application="answer"/>
     <action application="sleep" data="1000"/>
     <action application="voicemail" data="check default ${domain_name}"/>  

conf/testing/dialplan/default/0002_leave_videomail.xml

+<extension name="leave_videomail">
+  <condition field="destination_number" expression="^6000$">
+    <action application="answer"/>
+    <action application="sleep" data="1000"/>
+    <action application="voicemail" data="videomail ${domain_name} 1000"/>  
+  </condition>
+</extension>
+

conf/testing/dialplan/default/0003_check_videomail.xml

+<extension name="check_videomail">
+  <condition field="destination_number" expression="^6001$">
+    <action application="answer"/>
+    <action application="sleep" data="1000"/>
+    <action application="voicemail" data="check videomail ${domain_name} 1000"/>  
+  </condition>
+</extension>
+