updates (test cases): loadest, flood, duration curve (fdc and ldc)

• modified
  src/java/m/cfa/loadest/V1_0.json
• modified
  test/service_tests/STest.java
• added
  test/service_tests/m_durationcurve_1_0_CDSN_fdc.json
• added
  test/service_tests/m_durationcurve_1_0_CDWR_fdc.json
• added
  test/service_tests/m_durationcurve_1_0_STORET_fdc.json
• added
  test/service_tests/m_durationcurve_1_0_STORET_ldc.json
• added
  test/service_tests/m_durationcurve_1_0_USGS_fdc.json
• added
  test/service_tests/m_durationcurve_1_0_USGS_ldc.json
• added
  test/service_tests/m_flood_1_0_CDWR.json
• added
  test/service_tests/m_flood_1_0_STORET.json
• added
  test/service_tests/m_flood_1_0_USGS.json
• added
  test/service_tests/m_loadest_1_0_STORET.json
• added
  test/service_tests/m_loadest_1_0_USGS.json