Inclusion of foundation.security plugin in designer feature conflicts with JBDS 7 CR1

The foundation.security.linux fragment is included in the designer runtime feature. This can conflict with different versions of the plugin installed in versions of JBDS 7.

• Remove the plugin from the Teiid Designer feature since this was only a temporary measure due to lacking the plugin's feature in JBTIS. Done.

• Once JBTIS-107 has been resolved, include the foundation.security feature as a dependency.