CA-134864: Fix plugin call for SXM.

Signed-off-by: Siddharth Vinothkumar <siddharth.vinothkumar@citrix.com>
Reviewed-by: Chandrika Srinivasan <chandrika.srinivasan@citrix.com>

GitHub: closes #175 on xapi-project/sm

drivers/LVHDSR.py

@@ -2044,9 +2044,9 @@ def _prepareThin(self, attach):
                 fn = "detach"
             pools = self.session.xenapi.pool.get_all()
             master = self.session.xenapi.pool.get_master(pools[0])
-            rv = eval(self.session.xenapi.host.call_plugin(
+            rv = self.session.xenapi.host.call_plugin(
                     master, self.sr.THIN_PLUGIN, fn,
-                    {"srUuid": self.sr.uuid, "vdiUuid": self.uuid}))
+                    {"srUuid": self.sr.uuid, "vdiUuid": self.uuid})
             util.SMlog("call-plugin returned: %s" % rv)
             if not rv:
                 raise Exception('plugin %s failed' % self.sr.THIN_PLUGIN)