fix(libscan): delete map that keeps all file contents detected by FindLock to save memory (#1556)

* fix(libscan): delete Map that keeps all files detected by FindLock to save memory

* continue analyzing libs if err occurred

* FindLockDirs

* fix

* fix

subcmds/discover.go

@@ -216,6 +216,7 @@ host                = "{{$ip}}"
 #type               = "pseudo"
 #memo               = "DB Server"
 #findLock = true
+#findLockDirs = [ "/path/to/prject/lib" ]
 #lockfiles = ["/path/to/package-lock.json"]
 #cpeNames           = [ "cpe:/a:rubyonrails:ruby_on_rails:4.2.1" ]
 #owaspDCXMLPath     = "/path/to/dependency-check-report.xml"