Removed maven assembly plugin version from stratos parent pom.xml to be inherited from apache pom.xml
Removed maven assembly plugin version from stratos parent pom.xml to be inherited from apache pom.xml

Signed-off-by: Imesh Gunaratne <0a06823246d2ec9125b87ff9e895f16e469ce70b@apache.org>

hsbhathiya/stratos,anuruddhal/stratos,pkdevbox/stratos,asankasanjaya/stratos,dinithis/stratos,Thanu/stratos,asankasanjaya/stratos,pkdevbox/stratos,agentmilindu/stratos,agentmilindu/stratos,pubudu538/stratos,apache/stratos,ravihansa3000/stratos,agentmilindu/stratos,agentmilindu/stratos,gayangunarathne/stratos,gayangunarathne/stratos,asankasanjaya/stratos,Thanu/stratos,agentmilindu/stratos,gayangunarathne/stratos,anuruddhal/stratos,dinithis/stratos,apache/stratos,hsbhathiya/stratos,pubudu538/stratos,apache/stratos,Thanu/stratos,apache/stratos,ravihansa3000/stratos,gayangunarathne/stratos,pkdevbox/stratos,asankasanjaya/stratos,ravihansa3000/stratos,apache/stratos,dinithis/stratos,hsbhathiya/stratos,anuruddhal/stratos,gayangunarathne/stratos,hsbhathiya/stratos,asankasanjaya/stratos,Thanu/stratos,gayangunarathne/stratos,hsbhathiya/stratos,pubudu538/stratos,pubudu538/stratos,dinithis/stratos,ravihansa3000/stratos,gayangunarathne/stratos,apache/stratos,asankasanjaya/stratos,pkdevbox/stratos,dinithis/stratos,lasinducharith/stratos,ravihansa3000/stratos,lasinducharith/stratos,agentmilindu/stratos,Thanu/stratos,anuruddhal/stratos,Thanu/stratos,anuruddhal/stratos,anuruddhal/stratos,dinithis/stratos,dinithis/stratos,pkdevbox/stratos,ravihansa3000/stratos,pkdevbox/stratos,pkdevbox/stratos,Thanu/stratos,pubudu538/stratos,pubudu538/stratos,agentmilindu/stratos,lasinducharith/stratos,hsbhathiya/stratos,anuruddhal/stratos,lasinducharith/stratos,ravihansa3000/stratos,hsbhathiya/stratos,apache/stratos,asankasanjaya/stratos,lasinducharith/stratos,lasinducharith/stratos,pubudu538/stratos,lasinducharith/stratos