IOSAD-103 more [PEPSession cleanup]

pEpObjCTests/PEPSessionProviderTest.m

@@ -18,6 +18,11 @@
 
 @implementation PEPSessionProviderTest
 
+- (void)tearDown
+{
+    [PEPSession cleanup];
+}
+
 - (void)testSeperatedSessionPerThread {
     // Get main session
     PEPInternalSession *sessionMain = [PEPSessionProvider session];

pEpObjCTests/PepTests.m

@@ -22,6 +22,11 @@
     [PEPObjCAdapter setupTrustWordsDB:[NSBundle bundleForClass:[self class]]];
 }
 
+- (void)tearDown
+{
+    [PEPSession cleanup];
+}
+
 - (void)testSessionFinalization {
     PEPSession *session = [[PEPSession alloc] init];
     session = nil;