[master] Fixed libdhcpsrv unit tests that failed to compile under GTEST 1.5

Added output redirect operator "<<" to Lease class so new unit tests in
libdhcpsrv will compile under gtest 1.5.
Also fixed incorrect index into lease collection for same tests.

src/lib/dhcpsrv/lease.cc

@@ -266,5 +266,11 @@ Lease6::operator==(const Lease6& other) const {
             comments_ == other.comments_);
 }
 
+std::ostream&
+operator<<(std::ostream& os, const Lease& lease) {
+    os << lease.toText();
+    return (os);
+}
+
 } // namespace isc::dhcp
 } // namespace isc

src/lib/dhcpsrv/lease.h

@@ -401,6 +401,15 @@ typedef boost::shared_ptr<const Lease6> ConstLease6Ptr;
 /// @brief A collection of IPv6 leases.
 typedef std::vector<Lease6Ptr> Lease6Collection;
 
+/// @brief Stream output operator.
+///
+/// Dumps the output of Lease::toText to the given stream.
+/// @param os output stream to which the output is
+/// @param lease reference to Lease object to dump
+/// @return a reference to the output stream paramater
+std::ostream&
+operator<<(std::ostream& os, const Lease& lease);
+
 }; // end of isc::dhcp namespace
 }; // end of isc namespace
 

src/lib/dhcpsrv/tests/generic_lease_mgr_unittest.cc

@@ -1452,7 +1452,7 @@ GenericLeaseMgrTest::testRecreateLease4() {
     ++lease->valid_lft_;
     lease->fqdn_fwd_ = !lease->fqdn_fwd_;
     // Make sure that the lease has been really modified.
-    ASSERT_NE(*lease, *leases[1]);
+    ASSERT_NE(*lease, *leases[0]);
     // Add the updated lease.
     EXPECT_TRUE(lmptr_->addLease(lease));
     lmptr_->commit();
@@ -1492,7 +1492,7 @@ GenericLeaseMgrTest::testRecreateLease6() {
     ++lease->valid_lft_;
     lease->fqdn_fwd_ = !lease->fqdn_fwd_;
     // Make sure that the lease has been really modified.
-    ASSERT_NE(*lease, *leases[1]);
+    ASSERT_NE(*lease, *leases[0]);
     // Add the updated lease.
     EXPECT_TRUE(lmptr_->addLease(lease));
     lmptr_->commit();